mirror of https://github.com/bsnes-emu/bsnes.git
5830 lines
303 KiB
GLSL
5830 lines
303 KiB
GLSL
#version 150
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in vec4 position;
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in vec2 texCoord;
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out Vertex {
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vec2 vTexCoord;
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vec2 uv_step;
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vec2 il_step_multiple;
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float pixel_height_in_scanlines;
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};
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uniform vec4 targetSize;
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uniform vec4 sourceSize[];
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// USER SETTINGS BLOCK //
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#define crt_gamma 2.500000
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#define lcd_gamma 2.200000
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#define levels_contrast 1.0
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#define halation_weight 0.0
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#define diffusion_weight 0.075
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#define bloom_underestimate_levels 0.8
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#define bloom_excess 0.000000
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#define beam_min_sigma 0.020000
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#define beam_max_sigma 0.300000
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#define beam_spot_power 0.330000
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#define beam_min_shape 2.000000
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#define beam_max_shape 4.000000
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#define beam_shape_power 0.250000
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#define beam_horiz_filter 0.000000
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#define beam_horiz_sigma 0.35
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#define beam_horiz_linear_rgb_weight 1.000000
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#define convergence_offset_x_r -0.000000
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#define convergence_offset_x_g 0.000000
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#define convergence_offset_x_b 0.000000
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#define convergence_offset_y_r 0.000000
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#define convergence_offset_y_g -0.000000
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#define convergence_offset_y_b 0.000000
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#define mask_type 1.000000
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#define mask_sample_mode_desired 0.000000
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#define mask_specify_num_triads 0.000000
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#define mask_triad_size_desired 3.000000
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#define mask_num_triads_desired 480.000000
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#define aa_subpixel_r_offset_x_runtime -0.0
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#define aa_subpixel_r_offset_y_runtime 0.000000
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#define aa_cubic_c 0.500000
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#define aa_gauss_sigma 0.500000
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#define geom_mode_runtime 2.000000
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#define geom_radius 2.000000
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#define geom_view_dist 2.000000
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#define geom_tilt_angle_x 0.000000
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#define geom_tilt_angle_y 0.000000
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#define geom_aspect_ratio_x 432.000000
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#define geom_aspect_ratio_y 329.000000
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#define geom_overscan_x 1.000000
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#define geom_overscan_y 1.000000
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#define border_size 0.015
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#define border_darkness 2.0
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#define border_compress 2.500000
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#define interlace_bff 0.000000
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#define interlace_1080i 0.000000
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// END USER SETTINGS BLOCK //
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// compatibility macros for transparently converting HLSLisms into GLSLisms
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#define mul(a,b) (b*a)
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#define lerp(a,b,c) mix(a,b,c)
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#define saturate(c) clamp(c, 0.0, 1.0)
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#define frac(x) (fract(x))
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#define float2 vec2
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#define float3 vec3
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#define float4 vec4
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#define bool2 bvec2
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#define bool3 bvec3
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#define bool4 bvec4
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#define float2x2 mat2x2
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#define float3x3 mat3x3
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#define float4x4 mat4x4
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#define float4x3 mat4x3
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#define float2x4 mat2x4
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#define IN params
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#define texture_size sourceSize[0].xy
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#define video_size sourceSize[0].xy
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#define output_size targetSize.xy
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#define frame_count phase
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#define static
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#define inline
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#define const
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#define fmod(x,y) mod(x,y)
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#define ddx(c) dFdx(c)
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#define ddy(c) dFdy(c)
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#define atan2(x,y) atan(y,x)
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#define rsqrt(c) inversesqrt(c)
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#define input_texture source[0]
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#if defined(GL_ES)
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#define COMPAT_PRECISION mediump
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#else
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#define COMPAT_PRECISION
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#endif
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#if __VERSION__ >= 130
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#define COMPAT_TEXTURE texture
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#else
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#define COMPAT_TEXTURE texture2D
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#endif
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////////////////////////////////// INCLUDES //////////////////////////////////
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//#include "../user-settings.h"
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///////////////////////////// BEGIN USER-SETTINGS ////////////////////////////
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#ifndef USER_SETTINGS_H
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#define USER_SETTINGS_H
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///////////////////////////// DRIVER CAPABILITIES ////////////////////////////
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// The Cg compiler uses different "profiles" with different capabilities.
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// This shader requires a Cg compilation profile >= arbfp1, but a few options
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// require higher profiles like fp30 or fp40. The shader can't detect profile
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// or driver capabilities, so instead you must comment or uncomment the lines
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// below with "//" before "#define." Disable an option if you get compilation
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// errors resembling those listed. Generally speaking, all of these options
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// will run on nVidia cards, but only DRIVERS_ALLOW_TEX2DBIAS (if that) is
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// likely to run on ATI/AMD, due to the Cg compiler's profile limitations.
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// Derivatives: Unsupported on fp20, ps_1_1, ps_1_2, ps_1_3, and arbfp1.
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// Among other things, derivatives help us fix anisotropic filtering artifacts
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// with curved manually tiled phosphor mask coords. Related errors:
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// error C3004: function "float2 ddx(float2);" not supported in this profile
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// error C3004: function "float2 ddy(float2);" not supported in this profile
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//#define DRIVERS_ALLOW_DERIVATIVES
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// Fine derivatives: Unsupported on older ATI cards.
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// Fine derivatives enable 2x2 fragment block communication, letting us perform
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// fast single-pass blur operations. If your card uses coarse derivatives and
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// these are enabled, blurs could look broken. Derivatives are a prerequisite.
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#ifdef DRIVERS_ALLOW_DERIVATIVES
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#define DRIVERS_ALLOW_FINE_DERIVATIVES
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#endif
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// Dynamic looping: Requires an fp30 or newer profile.
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// This makes phosphor mask resampling faster in some cases. Related errors:
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// error C5013: profile does not support "for" statements and "for" could not
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// be unrolled
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//#define DRIVERS_ALLOW_DYNAMIC_BRANCHES
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// Without DRIVERS_ALLOW_DYNAMIC_BRANCHES, we need to use unrollable loops.
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// Using one static loop avoids overhead if the user is right, but if the user
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// is wrong (loops are allowed), breaking a loop into if-blocked pieces with a
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// binary search can potentially save some iterations. However, it may fail:
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// error C6001: Temporary register limit of 32 exceeded; 35 registers
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// needed to compile program
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//#define ACCOMODATE_POSSIBLE_DYNAMIC_LOOPS
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// tex2Dlod: Requires an fp40 or newer profile. This can be used to disable
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// anisotropic filtering, thereby fixing related artifacts. Related errors:
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// error C3004: function "float4 tex2Dlod(sampler2D, float4);" not supported in
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// this profile
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//#define DRIVERS_ALLOW_TEX2DLOD
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// tex2Dbias: Requires an fp30 or newer profile. This can be used to alleviate
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// artifacts from anisotropic filtering and mipmapping. Related errors:
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// error C3004: function "float4 tex2Dbias(sampler2D, float4);" not supported
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// in this profile
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//#define DRIVERS_ALLOW_TEX2DBIAS
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// Integrated graphics compatibility: Integrated graphics like Intel HD 4000
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// impose stricter limitations on register counts and instructions. Enable
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// INTEGRATED_GRAPHICS_COMPATIBILITY_MODE if you still see error C6001 or:
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// error C6002: Instruction limit of 1024 exceeded: 1523 instructions needed
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// to compile program.
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// Enabling integrated graphics compatibility mode will automatically disable:
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// 1.) PHOSPHOR_MASK_MANUALLY_RESIZE: The phosphor mask will be softer.
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// (This may be reenabled in a later release.)
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// 2.) RUNTIME_GEOMETRY_MODE
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// 3.) The high-quality 4x4 Gaussian resize for the bloom approximation
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//#define INTEGRATED_GRAPHICS_COMPATIBILITY_MODE
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//////////////////////////// USER CODEPATH OPTIONS ///////////////////////////
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// To disable a #define option, turn its line into a comment with "//."
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// RUNTIME VS. COMPILE-TIME OPTIONS (Major Performance Implications):
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// Enable runtime shader parameters in the Retroarch (etc.) GUI? They override
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// many of the options in this file and allow real-time tuning, but many of
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// them are slower. Disabling them and using this text file will boost FPS.
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#define RUNTIME_SHADER_PARAMS_ENABLE
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// Specify the phosphor bloom sigma at runtime? This option is 10% slower, but
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// it's the only way to do a wide-enough full bloom with a runtime dot pitch.
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#define RUNTIME_PHOSPHOR_BLOOM_SIGMA
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// Specify antialiasing weight parameters at runtime? (Costs ~20% with cubics)
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#define RUNTIME_ANTIALIAS_WEIGHTS
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// Specify subpixel offsets at runtime? (WARNING: EXTREMELY EXPENSIVE!)
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//#define RUNTIME_ANTIALIAS_SUBPIXEL_OFFSETS
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// Make beam_horiz_filter and beam_horiz_linear_rgb_weight into runtime shader
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// parameters? This will require more math or dynamic branching.
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#define RUNTIME_SCANLINES_HORIZ_FILTER_COLORSPACE
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// Specify the tilt at runtime? This makes things about 3% slower.
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#define RUNTIME_GEOMETRY_TILT
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// Specify the geometry mode at runtime?
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#define RUNTIME_GEOMETRY_MODE
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// Specify the phosphor mask type (aperture grille, slot mask, shadow mask) and
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// mode (Lanczos-resize, hardware resize, or tile 1:1) at runtime, even without
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// dynamic branches? This is cheap if mask_resize_viewport_scale is small.
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#define FORCE_RUNTIME_PHOSPHOR_MASK_MODE_TYPE_SELECT
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// PHOSPHOR MASK:
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// Manually resize the phosphor mask for best results (slower)? Disabling this
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// removes the option to do so, but it may be faster without dynamic branches.
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#define PHOSPHOR_MASK_MANUALLY_RESIZE
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// If we sinc-resize the mask, should we Lanczos-window it (slower but better)?
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#define PHOSPHOR_MASK_RESIZE_LANCZOS_WINDOW
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// Larger blurs are expensive, but we need them to blur larger triads. We can
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// detect the right blur if the triad size is static or our profile allows
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// dynamic branches, but otherwise we use the largest blur the user indicates
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// they might need:
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#define PHOSPHOR_BLOOM_TRIADS_LARGER_THAN_3_PIXELS
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//#define PHOSPHOR_BLOOM_TRIADS_LARGER_THAN_6_PIXELS
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//#define PHOSPHOR_BLOOM_TRIADS_LARGER_THAN_9_PIXELS
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//#define PHOSPHOR_BLOOM_TRIADS_LARGER_THAN_12_PIXELS
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// Here's a helpful chart:
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// MaxTriadSize BlurSize MinTriadCountsByResolution
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// 3.0 9.0 480/640/960/1920 triads at 1080p/1440p/2160p/4320p, 4:3 aspect
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// 6.0 17.0 240/320/480/960 triads at 1080p/1440p/2160p/4320p, 4:3 aspect
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// 9.0 25.0 160/213/320/640 triads at 1080p/1440p/2160p/4320p, 4:3 aspect
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// 12.0 31.0 120/160/240/480 triads at 1080p/1440p/2160p/4320p, 4:3 aspect
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// 18.0 43.0 80/107/160/320 triads at 1080p/1440p/2160p/4320p, 4:3 aspect
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/////////////////////////////// USER PARAMETERS //////////////////////////////
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// Note: Many of these static parameters are overridden by runtime shader
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// parameters when those are enabled. However, many others are static codepath
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// options that were cleaner or more convert to code as static constants.
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// GAMMA:
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static const float crt_gamma_static = 2.5; // range [1, 5]
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static const float lcd_gamma_static = 2.2; // range [1, 5]
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// LEVELS MANAGEMENT:
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// Control the final multiplicative image contrast:
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static const float levels_contrast_static = 1.0; // range [0, 4)
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// We auto-dim to avoid clipping between passes and restore brightness
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// later. Control the dim factor here: Lower values clip less but crush
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// blacks more (static only for now).
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static const float levels_autodim_temp = 0.5; // range (0, 1] default is 0.5 but that was unnecessarily dark for me, so I set it to 1.0
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// HALATION/DIFFUSION/BLOOM:
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// Halation weight: How much energy should be lost to electrons bounding
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// around under the CRT glass and exciting random phosphors?
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static const float halation_weight_static = 0.0; // range [0, 1]
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// Refractive diffusion weight: How much light should spread/diffuse from
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// refracting through the CRT glass?
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static const float diffusion_weight_static = 0.075; // range [0, 1]
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// Underestimate brightness: Bright areas bloom more, but we can base the
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// bloom brightpass on a lower brightness to sharpen phosphors, or a higher
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// brightness to soften them. Low values clip, but >= 0.8 looks okay.
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static const float bloom_underestimate_levels_static = 0.8; // range [0, 5]
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// Blur all colors more than necessary for a softer phosphor bloom?
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static const float bloom_excess_static = 0.0; // range [0, 1]
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// The BLOOM_APPROX pass approximates a phosphor blur early on with a small
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// blurred resize of the input (convergence offsets are applied as well).
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// There are three filter options (static option only for now):
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// 0.) Bilinear resize: A fast, close approximation to a 4x4 resize
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// if min_allowed_viewport_triads and the BLOOM_APPROX resolution are sane
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// and beam_max_sigma is low.
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// 1.) 3x3 resize blur: Medium speed, soft/smeared from bilinear blurring,
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// always uses a static sigma regardless of beam_max_sigma or
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// mask_num_triads_desired.
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// 2.) True 4x4 Gaussian resize: Slowest, technically correct.
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// These options are more pronounced for the fast, unbloomed shader version.
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#ifndef RADEON_FIX
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static const float bloom_approx_filter_static = 2.0;
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#else
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static const float bloom_approx_filter_static = 1.0;
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#endif
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// ELECTRON BEAM SCANLINE DISTRIBUTION:
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// How many scanlines should contribute light to each pixel? Using more
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// scanlines is slower (especially for a generalized Gaussian) but less
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// distorted with larger beam sigmas (especially for a pure Gaussian). The
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// max_beam_sigma at which the closest unused weight is guaranteed <
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// 1.0/255.0 (for a 3x antialiased pure Gaussian) is:
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// 2 scanlines: max_beam_sigma = 0.2089; distortions begin ~0.34; 141.7 FPS pure, 131.9 FPS generalized
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// 3 scanlines, max_beam_sigma = 0.3879; distortions begin ~0.52; 137.5 FPS pure; 123.8 FPS generalized
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// 4 scanlines, max_beam_sigma = 0.5723; distortions begin ~0.70; 134.7 FPS pure; 117.2 FPS generalized
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// 5 scanlines, max_beam_sigma = 0.7591; distortions begin ~0.89; 131.6 FPS pure; 112.1 FPS generalized
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// 6 scanlines, max_beam_sigma = 0.9483; distortions begin ~1.08; 127.9 FPS pure; 105.6 FPS generalized
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static const float beam_num_scanlines = 3.0; // range [2, 6]
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// A generalized Gaussian beam varies shape with color too, now just width.
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// It's slower but more flexible (static option only for now).
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static const bool beam_generalized_gaussian = true;
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// What kind of scanline antialiasing do you want?
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// 0: Sample weights at 1x; 1: Sample weights at 3x; 2: Compute an integral
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// Integrals are slow (especially for generalized Gaussians) and rarely any
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// better than 3x antialiasing (static option only for now).
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static const float beam_antialias_level = 1.0; // range [0, 2]
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// Min/max standard deviations for scanline beams: Higher values widen and
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// soften scanlines. Depending on other options, low min sigmas can alias.
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static const float beam_min_sigma_static = 0.02; // range (0, 1]
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static const float beam_max_sigma_static = 0.3; // range (0, 1]
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// Beam width varies as a function of color: A power function (0) is more
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// configurable, but a spherical function (1) gives the widest beam
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// variability without aliasing (static option only for now).
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static const float beam_spot_shape_function = 0.0;
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// Spot shape power: Powers <= 1 give smoother spot shapes but lower
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// sharpness. Powers >= 1.0 are awful unless mix/max sigmas are close.
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static const float beam_spot_power_static = 1.0/3.0; // range (0, 16]
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// Generalized Gaussian max shape parameters: Higher values give flatter
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// scanline plateaus and steeper dropoffs, simultaneously widening and
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// sharpening scanlines at the cost of aliasing. 2.0 is pure Gaussian, and
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// values > ~40.0 cause artifacts with integrals.
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static const float beam_min_shape_static = 2.0; // range [2, 32]
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static const float beam_max_shape_static = 4.0; // range [2, 32]
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// Generalized Gaussian shape power: Affects how quickly the distribution
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// changes shape from Gaussian to steep/plateaued as color increases from 0
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// to 1.0. Higher powers appear softer for most colors, and lower powers
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// appear sharper for most colors.
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static const float beam_shape_power_static = 1.0/4.0; // range (0, 16]
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// What filter should be used to sample scanlines horizontally?
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// 0: Quilez (fast), 1: Gaussian (configurable), 2: Lanczos2 (sharp)
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static const float beam_horiz_filter_static = 0.0;
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// Standard deviation for horizontal Gaussian resampling:
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static const float beam_horiz_sigma_static = 0.35; // range (0, 2/3]
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// Do horizontal scanline sampling in linear RGB (correct light mixing),
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// gamma-encoded RGB (darker, hard spot shape, may better match bandwidth-
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// limiting circuitry in some CRT's), or a weighted avg.?
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static const float beam_horiz_linear_rgb_weight_static = 1.0; // range [0, 1]
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// Simulate scanline misconvergence? This needs 3x horizontal texture
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// samples and 3x texture samples of BLOOM_APPROX and HALATION_BLUR in
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// later passes (static option only for now).
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static const bool beam_misconvergence = true;
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// Convergence offsets in x/y directions for R/G/B scanline beams in units
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// of scanlines. Positive offsets go right/down; ranges [-2, 2]
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static const float2 convergence_offsets_r_static = float2(0.1, 0.2);
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static const float2 convergence_offsets_g_static = float2(0.3, 0.4);
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static const float2 convergence_offsets_b_static = float2(0.5, 0.6);
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// Detect interlacing (static option only for now)?
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static const bool interlace_detect = true;
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// Assume 1080-line sources are interlaced?
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static const bool interlace_1080i_static = false;
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// For interlaced sources, assume TFF (top-field first) or BFF order?
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// (Whether this matters depends on the nature of the interlaced input.)
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static const bool interlace_bff_static = false;
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// ANTIALIASING:
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// What AA level do you want for curvature/overscan/subpixels? Options:
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// 0x (none), 1x (sample subpixels), 4x, 5x, 6x, 7x, 8x, 12x, 16x, 20x, 24x
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// (Static option only for now)
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static const float aa_level = 12.0; // range [0, 24]
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// What antialiasing filter do you want (static option only)? Options:
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// 0: Box (separable), 1: Box (cylindrical),
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// 2: Tent (separable), 3: Tent (cylindrical),
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// 4: Gaussian (separable), 5: Gaussian (cylindrical),
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// 6: Cubic* (separable), 7: Cubic* (cylindrical, poor)
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// 8: Lanczos Sinc (separable), 9: Lanczos Jinc (cylindrical, poor)
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// * = Especially slow with RUNTIME_ANTIALIAS_WEIGHTS
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static const float aa_filter = 6.0; // range [0, 9]
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// Flip the sample grid on odd/even frames (static option only for now)?
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static const bool aa_temporal = false;
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// Use RGB subpixel offsets for antialiasing? The pixel is at green, and
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// the blue offset is the negative r offset; range [0, 0.5]
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static const float2 aa_subpixel_r_offset_static = float2(-1.0/3.0, 0.0);//float2(0.0);
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// Cubics: See http://www.imagemagick.org/Usage/filter/#mitchell
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// 1.) "Keys cubics" with B = 1 - 2C are considered the highest quality.
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// 2.) C = 0.5 (default) is Catmull-Rom; higher C's apply sharpening.
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// 3.) C = 1.0/3.0 is the Mitchell-Netravali filter.
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// 4.) C = 0.0 is a soft spline filter.
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static const float aa_cubic_c_static = 0.5; // range [0, 4]
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// Standard deviation for Gaussian antialiasing: Try 0.5/aa_pixel_diameter.
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static const float aa_gauss_sigma_static = 0.5; // range [0.0625, 1.0]
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// PHOSPHOR MASK:
|
|
// Mask type: 0 = aperture grille, 1 = slot mask, 2 = EDP shadow mask
|
|
static const float mask_type_static = 1.0; // range [0, 2]
|
|
// We can sample the mask three ways. Pick 2/3 from: Pretty/Fast/Flexible.
|
|
// 0.) Sinc-resize to the desired dot pitch manually (pretty/slow/flexible).
|
|
// This requires PHOSPHOR_MASK_MANUALLY_RESIZE to be #defined.
|
|
// 1.) Hardware-resize to the desired dot pitch (ugly/fast/flexible). This
|
|
// is halfway decent with LUT mipmapping but atrocious without it.
|
|
// 2.) Tile it without resizing at a 1:1 texel:pixel ratio for flat coords
|
|
// (pretty/fast/inflexible). Each input LUT has a fixed dot pitch.
|
|
// This mode reuses the same masks, so triads will be enormous unless
|
|
// you change the mask LUT filenames in your .cgp file.
|
|
static const float mask_sample_mode_static = 0.0; // range [0, 2]
|
|
// Prefer setting the triad size (0.0) or number on the screen (1.0)?
|
|
// If RUNTIME_PHOSPHOR_BLOOM_SIGMA isn't #defined, the specified triad size
|
|
// will always be used to calculate the full bloom sigma statically.
|
|
static const float mask_specify_num_triads_static = 0.0; // range [0, 1]
|
|
// Specify the phosphor triad size, in pixels. Each tile (usually with 8
|
|
// triads) will be rounded to the nearest integer tile size and clamped to
|
|
// obey minimum size constraints (imposed to reduce downsize taps) and
|
|
// maximum size constraints (imposed to have a sane MASK_RESIZE FBO size).
|
|
// To increase the size limit, double the viewport-relative scales for the
|
|
// two MASK_RESIZE passes in crt-royale.cgp and user-cgp-contants.h.
|
|
// range [1, mask_texture_small_size/mask_triads_per_tile]
|
|
static const float mask_triad_size_desired_static = 24.0 / 8.0;
|
|
// If mask_specify_num_triads is 1.0/true, we'll go by this instead (the
|
|
// final size will be rounded and constrained as above); default 480.0
|
|
static const float mask_num_triads_desired_static = 480.0;
|
|
// How many lobes should the sinc/Lanczos resizer use? More lobes require
|
|
// more samples and avoid moire a bit better, but some is unavoidable
|
|
// depending on the destination size (static option for now).
|
|
static const float mask_sinc_lobes = 3.0; // range [2, 4]
|
|
// The mask is resized using a variable number of taps in each dimension,
|
|
// but some Cg profiles always fetch a constant number of taps no matter
|
|
// what (no dynamic branching). We can limit the maximum number of taps if
|
|
// we statically limit the minimum phosphor triad size. Larger values are
|
|
// faster, but the limit IS enforced (static option only, forever);
|
|
// range [1, mask_texture_small_size/mask_triads_per_tile]
|
|
// TODO: Make this 1.0 and compensate with smarter sampling!
|
|
static const float mask_min_allowed_triad_size = 2.0;
|
|
|
|
// GEOMETRY:
|
|
// Geometry mode:
|
|
// 0: Off (default), 1: Spherical mapping (like cgwg's),
|
|
// 2: Alt. spherical mapping (more bulbous), 3: Cylindrical/Trinitron
|
|
static const float geom_mode_static = 0.0; // range [0, 3]
|
|
// Radius of curvature: Measured in units of your viewport's diagonal size.
|
|
static const float geom_radius_static = 2.0; // range [1/(2*pi), 1024]
|
|
// View dist is the distance from the player to their physical screen, in
|
|
// units of the viewport's diagonal size. It controls the field of view.
|
|
static const float geom_view_dist_static = 2.0; // range [0.5, 1024]
|
|
// Tilt angle in radians (clockwise around up and right vectors):
|
|
static const float2 geom_tilt_angle_static = float2(0.0, 0.0); // range [-pi, pi]
|
|
// Aspect ratio: When the true viewport size is unknown, this value is used
|
|
// to help convert between the phosphor triad size and count, along with
|
|
// the mask_resize_viewport_scale constant from user-cgp-constants.h. Set
|
|
// this equal to Retroarch's display aspect ratio (DAR) for best results;
|
|
// range [1, geom_max_aspect_ratio from user-cgp-constants.h];
|
|
// default (256/224)*(54/47) = 1.313069909 (see below)
|
|
static const float geom_aspect_ratio_static = 1.313069909;
|
|
// Before getting into overscan, here's some general aspect ratio info:
|
|
// - DAR = display aspect ratio = SAR * PAR; as in your Retroarch setting
|
|
// - SAR = storage aspect ratio = DAR / PAR; square pixel emulator frame AR
|
|
// - PAR = pixel aspect ratio = DAR / SAR; holds regardless of cropping
|
|
// Geometry processing has to "undo" the screen-space 2D DAR to calculate
|
|
// 3D view vectors, then reapplies the aspect ratio to the simulated CRT in
|
|
// uv-space. To ensure the source SAR is intended for a ~4:3 DAR, either:
|
|
// a.) Enable Retroarch's "Crop Overscan"
|
|
// b.) Readd horizontal padding: Set overscan to e.g. N*(1.0, 240.0/224.0)
|
|
// Real consoles use horizontal black padding in the signal, but emulators
|
|
// often crop this without cropping the vertical padding; a 256x224 [S]NES
|
|
// frame (8:7 SAR) is intended for a ~4:3 DAR, but a 256x240 frame is not.
|
|
// The correct [S]NES PAR is 54:47, found by blargg and NewRisingSun:
|
|
// http://board.zsnes.com/phpBB3/viewtopic.php?f=22&t=11928&start=50
|
|
// http://forums.nesdev.com/viewtopic.php?p=24815#p24815
|
|
// For flat output, it's okay to set DAR = [existing] SAR * [correct] PAR
|
|
// without doing a. or b., but horizontal image borders will be tighter
|
|
// than vertical ones, messing up curvature and overscan. Fixing the
|
|
// padding first corrects this.
|
|
// Overscan: Amount to "zoom in" before cropping. You can zoom uniformly
|
|
// or adjust x/y independently to e.g. readd horizontal padding, as noted
|
|
// above: Values < 1.0 zoom out; range (0, inf)
|
|
static const float2 geom_overscan_static = float2(1.0, 1.0);// * 1.005 * (1.0, 240/224.0)
|
|
// Compute a proper pixel-space to texture-space matrix even without ddx()/
|
|
// ddy()? This is ~8.5% slower but improves antialiasing/subpixel filtering
|
|
// with strong curvature (static option only for now).
|
|
static const bool geom_force_correct_tangent_matrix = true;
|
|
|
|
// BORDERS:
|
|
// Rounded border size in texture uv coords:
|
|
static const float border_size_static = 0.015; // range [0, 0.5]
|
|
// Border darkness: Moderate values darken the border smoothly, and high
|
|
// values make the image very dark just inside the border:
|
|
static const float border_darkness_static = 2.0; // range [0, inf)
|
|
// Border compression: High numbers compress border transitions, narrowing
|
|
// the dark border area.
|
|
static const float border_compress_static = 2.5; // range [1, inf)
|
|
|
|
|
|
#endif // USER_SETTINGS_H
|
|
|
|
//////////////////////////// END USER-SETTINGS //////////////////////////
|
|
|
|
//#include "derived-settings-and-constants.h"
|
|
|
|
//////////////////// BEGIN DERIVED-SETTINGS-AND-CONSTANTS ////////////////////
|
|
|
|
#ifndef DERIVED_SETTINGS_AND_CONSTANTS_H
|
|
#define DERIVED_SETTINGS_AND_CONSTANTS_H
|
|
|
|
///////////////////////////// GPL LICENSE NOTICE /////////////////////////////
|
|
|
|
// crt-royale: A full-featured CRT shader, with cheese.
|
|
// Copyright (C) 2014 TroggleMonkey <trogglemonkey@gmx.com>
|
|
//
|
|
// This program is free software; you can redistribute it and/or modify it
|
|
// under the terms of the GNU General Public License as published by the Free
|
|
// Software Foundation; either version 2 of the License, or any later version.
|
|
//
|
|
// This program is distributed in the hope that it will be useful, but WITHOUT
|
|
// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
|
// more details.
|
|
//
|
|
// You should have received a copy of the GNU General Public License along with
|
|
// this program; if not, write to the Free Software Foundation, Inc., 59 Temple
|
|
// Place, Suite 330, Boston, MA 02111-1307 USA
|
|
|
|
|
|
///////////////////////////////// DESCRIPTION ////////////////////////////////
|
|
|
|
// These macros and constants can be used across the whole codebase.
|
|
// Unlike the values in user-settings.cgh, end users shouldn't modify these.
|
|
|
|
|
|
/////////////////////////////// BEGIN INCLUDES ///////////////////////////////
|
|
|
|
//#include "../user-settings.h"
|
|
|
|
///////////////////////////// BEGIN USER-SETTINGS ////////////////////////////
|
|
|
|
#ifndef USER_SETTINGS_H
|
|
#define USER_SETTINGS_H
|
|
|
|
///////////////////////////// DRIVER CAPABILITIES ////////////////////////////
|
|
|
|
// The Cg compiler uses different "profiles" with different capabilities.
|
|
// This shader requires a Cg compilation profile >= arbfp1, but a few options
|
|
// require higher profiles like fp30 or fp40. The shader can't detect profile
|
|
// or driver capabilities, so instead you must comment or uncomment the lines
|
|
// below with "//" before "#define." Disable an option if you get compilation
|
|
// errors resembling those listed. Generally speaking, all of these options
|
|
// will run on nVidia cards, but only DRIVERS_ALLOW_TEX2DBIAS (if that) is
|
|
// likely to run on ATI/AMD, due to the Cg compiler's profile limitations.
|
|
|
|
// Derivatives: Unsupported on fp20, ps_1_1, ps_1_2, ps_1_3, and arbfp1.
|
|
// Among other things, derivatives help us fix anisotropic filtering artifacts
|
|
// with curved manually tiled phosphor mask coords. Related errors:
|
|
// error C3004: function "float2 ddx(float2);" not supported in this profile
|
|
// error C3004: function "float2 ddy(float2);" not supported in this profile
|
|
//#define DRIVERS_ALLOW_DERIVATIVES
|
|
|
|
// Fine derivatives: Unsupported on older ATI cards.
|
|
// Fine derivatives enable 2x2 fragment block communication, letting us perform
|
|
// fast single-pass blur operations. If your card uses coarse derivatives and
|
|
// these are enabled, blurs could look broken. Derivatives are a prerequisite.
|
|
#ifdef DRIVERS_ALLOW_DERIVATIVES
|
|
#define DRIVERS_ALLOW_FINE_DERIVATIVES
|
|
#endif
|
|
|
|
// Dynamic looping: Requires an fp30 or newer profile.
|
|
// This makes phosphor mask resampling faster in some cases. Related errors:
|
|
// error C5013: profile does not support "for" statements and "for" could not
|
|
// be unrolled
|
|
//#define DRIVERS_ALLOW_DYNAMIC_BRANCHES
|
|
|
|
// Without DRIVERS_ALLOW_DYNAMIC_BRANCHES, we need to use unrollable loops.
|
|
// Using one static loop avoids overhead if the user is right, but if the user
|
|
// is wrong (loops are allowed), breaking a loop into if-blocked pieces with a
|
|
// binary search can potentially save some iterations. However, it may fail:
|
|
// error C6001: Temporary register limit of 32 exceeded; 35 registers
|
|
// needed to compile program
|
|
//#define ACCOMODATE_POSSIBLE_DYNAMIC_LOOPS
|
|
|
|
// tex2Dlod: Requires an fp40 or newer profile. This can be used to disable
|
|
// anisotropic filtering, thereby fixing related artifacts. Related errors:
|
|
// error C3004: function "float4 tex2Dlod(sampler2D, float4);" not supported in
|
|
// this profile
|
|
//#define DRIVERS_ALLOW_TEX2DLOD
|
|
|
|
// tex2Dbias: Requires an fp30 or newer profile. This can be used to alleviate
|
|
// artifacts from anisotropic filtering and mipmapping. Related errors:
|
|
// error C3004: function "float4 tex2Dbias(sampler2D, float4);" not supported
|
|
// in this profile
|
|
//#define DRIVERS_ALLOW_TEX2DBIAS
|
|
|
|
// Integrated graphics compatibility: Integrated graphics like Intel HD 4000
|
|
// impose stricter limitations on register counts and instructions. Enable
|
|
// INTEGRATED_GRAPHICS_COMPATIBILITY_MODE if you still see error C6001 or:
|
|
// error C6002: Instruction limit of 1024 exceeded: 1523 instructions needed
|
|
// to compile program.
|
|
// Enabling integrated graphics compatibility mode will automatically disable:
|
|
// 1.) PHOSPHOR_MASK_MANUALLY_RESIZE: The phosphor mask will be softer.
|
|
// (This may be reenabled in a later release.)
|
|
// 2.) RUNTIME_GEOMETRY_MODE
|
|
// 3.) The high-quality 4x4 Gaussian resize for the bloom approximation
|
|
//#define INTEGRATED_GRAPHICS_COMPATIBILITY_MODE
|
|
|
|
|
|
//////////////////////////// USER CODEPATH OPTIONS ///////////////////////////
|
|
|
|
// To disable a #define option, turn its line into a comment with "//."
|
|
|
|
// RUNTIME VS. COMPILE-TIME OPTIONS (Major Performance Implications):
|
|
// Enable runtime shader parameters in the Retroarch (etc.) GUI? They override
|
|
// many of the options in this file and allow real-time tuning, but many of
|
|
// them are slower. Disabling them and using this text file will boost FPS.
|
|
#define RUNTIME_SHADER_PARAMS_ENABLE
|
|
// Specify the phosphor bloom sigma at runtime? This option is 10% slower, but
|
|
// it's the only way to do a wide-enough full bloom with a runtime dot pitch.
|
|
#define RUNTIME_PHOSPHOR_BLOOM_SIGMA
|
|
// Specify antialiasing weight parameters at runtime? (Costs ~20% with cubics)
|
|
#define RUNTIME_ANTIALIAS_WEIGHTS
|
|
// Specify subpixel offsets at runtime? (WARNING: EXTREMELY EXPENSIVE!)
|
|
//#define RUNTIME_ANTIALIAS_SUBPIXEL_OFFSETS
|
|
// Make beam_horiz_filter and beam_horiz_linear_rgb_weight into runtime shader
|
|
// parameters? This will require more math or dynamic branching.
|
|
#define RUNTIME_SCANLINES_HORIZ_FILTER_COLORSPACE
|
|
// Specify the tilt at runtime? This makes things about 3% slower.
|
|
#define RUNTIME_GEOMETRY_TILT
|
|
// Specify the geometry mode at runtime?
|
|
#define RUNTIME_GEOMETRY_MODE
|
|
// Specify the phosphor mask type (aperture grille, slot mask, shadow mask) and
|
|
// mode (Lanczos-resize, hardware resize, or tile 1:1) at runtime, even without
|
|
// dynamic branches? This is cheap if mask_resize_viewport_scale is small.
|
|
#define FORCE_RUNTIME_PHOSPHOR_MASK_MODE_TYPE_SELECT
|
|
|
|
// PHOSPHOR MASK:
|
|
// Manually resize the phosphor mask for best results (slower)? Disabling this
|
|
// removes the option to do so, but it may be faster without dynamic branches.
|
|
#define PHOSPHOR_MASK_MANUALLY_RESIZE
|
|
// If we sinc-resize the mask, should we Lanczos-window it (slower but better)?
|
|
#define PHOSPHOR_MASK_RESIZE_LANCZOS_WINDOW
|
|
// Larger blurs are expensive, but we need them to blur larger triads. We can
|
|
// detect the right blur if the triad size is static or our profile allows
|
|
// dynamic branches, but otherwise we use the largest blur the user indicates
|
|
// they might need:
|
|
#define PHOSPHOR_BLOOM_TRIADS_LARGER_THAN_3_PIXELS
|
|
//#define PHOSPHOR_BLOOM_TRIADS_LARGER_THAN_6_PIXELS
|
|
//#define PHOSPHOR_BLOOM_TRIADS_LARGER_THAN_9_PIXELS
|
|
//#define PHOSPHOR_BLOOM_TRIADS_LARGER_THAN_12_PIXELS
|
|
// Here's a helpful chart:
|
|
// MaxTriadSize BlurSize MinTriadCountsByResolution
|
|
// 3.0 9.0 480/640/960/1920 triads at 1080p/1440p/2160p/4320p, 4:3 aspect
|
|
// 6.0 17.0 240/320/480/960 triads at 1080p/1440p/2160p/4320p, 4:3 aspect
|
|
// 9.0 25.0 160/213/320/640 triads at 1080p/1440p/2160p/4320p, 4:3 aspect
|
|
// 12.0 31.0 120/160/240/480 triads at 1080p/1440p/2160p/4320p, 4:3 aspect
|
|
// 18.0 43.0 80/107/160/320 triads at 1080p/1440p/2160p/4320p, 4:3 aspect
|
|
|
|
|
|
/////////////////////////////// USER PARAMETERS //////////////////////////////
|
|
|
|
// Note: Many of these static parameters are overridden by runtime shader
|
|
// parameters when those are enabled. However, many others are static codepath
|
|
// options that were cleaner or more convert to code as static constants.
|
|
|
|
// GAMMA:
|
|
static const float crt_gamma_static = 2.5; // range [1, 5]
|
|
static const float lcd_gamma_static = 2.2; // range [1, 5]
|
|
|
|
// LEVELS MANAGEMENT:
|
|
// Control the final multiplicative image contrast:
|
|
static const float levels_contrast_static = 1.0; // range [0, 4)
|
|
// We auto-dim to avoid clipping between passes and restore brightness
|
|
// later. Control the dim factor here: Lower values clip less but crush
|
|
// blacks more (static only for now).
|
|
static const float levels_autodim_temp = 0.5; // range (0, 1] default is 0.5 but that was unnecessarily dark for me, so I set it to 1.0
|
|
|
|
// HALATION/DIFFUSION/BLOOM:
|
|
// Halation weight: How much energy should be lost to electrons bounding
|
|
// around under the CRT glass and exciting random phosphors?
|
|
static const float halation_weight_static = 0.0; // range [0, 1]
|
|
// Refractive diffusion weight: How much light should spread/diffuse from
|
|
// refracting through the CRT glass?
|
|
static const float diffusion_weight_static = 0.075; // range [0, 1]
|
|
// Underestimate brightness: Bright areas bloom more, but we can base the
|
|
// bloom brightpass on a lower brightness to sharpen phosphors, or a higher
|
|
// brightness to soften them. Low values clip, but >= 0.8 looks okay.
|
|
static const float bloom_underestimate_levels_static = 0.8; // range [0, 5]
|
|
// Blur all colors more than necessary for a softer phosphor bloom?
|
|
static const float bloom_excess_static = 0.0; // range [0, 1]
|
|
// The BLOOM_APPROX pass approximates a phosphor blur early on with a small
|
|
// blurred resize of the input (convergence offsets are applied as well).
|
|
// There are three filter options (static option only for now):
|
|
// 0.) Bilinear resize: A fast, close approximation to a 4x4 resize
|
|
// if min_allowed_viewport_triads and the BLOOM_APPROX resolution are sane
|
|
// and beam_max_sigma is low.
|
|
// 1.) 3x3 resize blur: Medium speed, soft/smeared from bilinear blurring,
|
|
// always uses a static sigma regardless of beam_max_sigma or
|
|
// mask_num_triads_desired.
|
|
// 2.) True 4x4 Gaussian resize: Slowest, technically correct.
|
|
// These options are more pronounced for the fast, unbloomed shader version.
|
|
#ifndef RADEON_FIX
|
|
static const float bloom_approx_filter_static = 2.0;
|
|
#else
|
|
static const float bloom_approx_filter_static = 1.0;
|
|
#endif
|
|
|
|
// ELECTRON BEAM SCANLINE DISTRIBUTION:
|
|
// How many scanlines should contribute light to each pixel? Using more
|
|
// scanlines is slower (especially for a generalized Gaussian) but less
|
|
// distorted with larger beam sigmas (especially for a pure Gaussian). The
|
|
// max_beam_sigma at which the closest unused weight is guaranteed <
|
|
// 1.0/255.0 (for a 3x antialiased pure Gaussian) is:
|
|
// 2 scanlines: max_beam_sigma = 0.2089; distortions begin ~0.34; 141.7 FPS pure, 131.9 FPS generalized
|
|
// 3 scanlines, max_beam_sigma = 0.3879; distortions begin ~0.52; 137.5 FPS pure; 123.8 FPS generalized
|
|
// 4 scanlines, max_beam_sigma = 0.5723; distortions begin ~0.70; 134.7 FPS pure; 117.2 FPS generalized
|
|
// 5 scanlines, max_beam_sigma = 0.7591; distortions begin ~0.89; 131.6 FPS pure; 112.1 FPS generalized
|
|
// 6 scanlines, max_beam_sigma = 0.9483; distortions begin ~1.08; 127.9 FPS pure; 105.6 FPS generalized
|
|
static const float beam_num_scanlines = 3.0; // range [2, 6]
|
|
// A generalized Gaussian beam varies shape with color too, now just width.
|
|
// It's slower but more flexible (static option only for now).
|
|
static const bool beam_generalized_gaussian = true;
|
|
// What kind of scanline antialiasing do you want?
|
|
// 0: Sample weights at 1x; 1: Sample weights at 3x; 2: Compute an integral
|
|
// Integrals are slow (especially for generalized Gaussians) and rarely any
|
|
// better than 3x antialiasing (static option only for now).
|
|
static const float beam_antialias_level = 1.0; // range [0, 2]
|
|
// Min/max standard deviations for scanline beams: Higher values widen and
|
|
// soften scanlines. Depending on other options, low min sigmas can alias.
|
|
static const float beam_min_sigma_static = 0.02; // range (0, 1]
|
|
static const float beam_max_sigma_static = 0.3; // range (0, 1]
|
|
// Beam width varies as a function of color: A power function (0) is more
|
|
// configurable, but a spherical function (1) gives the widest beam
|
|
// variability without aliasing (static option only for now).
|
|
static const float beam_spot_shape_function = 0.0;
|
|
// Spot shape power: Powers <= 1 give smoother spot shapes but lower
|
|
// sharpness. Powers >= 1.0 are awful unless mix/max sigmas are close.
|
|
static const float beam_spot_power_static = 1.0/3.0; // range (0, 16]
|
|
// Generalized Gaussian max shape parameters: Higher values give flatter
|
|
// scanline plateaus and steeper dropoffs, simultaneously widening and
|
|
// sharpening scanlines at the cost of aliasing. 2.0 is pure Gaussian, and
|
|
// values > ~40.0 cause artifacts with integrals.
|
|
static const float beam_min_shape_static = 2.0; // range [2, 32]
|
|
static const float beam_max_shape_static = 4.0; // range [2, 32]
|
|
// Generalized Gaussian shape power: Affects how quickly the distribution
|
|
// changes shape from Gaussian to steep/plateaued as color increases from 0
|
|
// to 1.0. Higher powers appear softer for most colors, and lower powers
|
|
// appear sharper for most colors.
|
|
static const float beam_shape_power_static = 1.0/4.0; // range (0, 16]
|
|
// What filter should be used to sample scanlines horizontally?
|
|
// 0: Quilez (fast), 1: Gaussian (configurable), 2: Lanczos2 (sharp)
|
|
static const float beam_horiz_filter_static = 0.0;
|
|
// Standard deviation for horizontal Gaussian resampling:
|
|
static const float beam_horiz_sigma_static = 0.35; // range (0, 2/3]
|
|
// Do horizontal scanline sampling in linear RGB (correct light mixing),
|
|
// gamma-encoded RGB (darker, hard spot shape, may better match bandwidth-
|
|
// limiting circuitry in some CRT's), or a weighted avg.?
|
|
static const float beam_horiz_linear_rgb_weight_static = 1.0; // range [0, 1]
|
|
// Simulate scanline misconvergence? This needs 3x horizontal texture
|
|
// samples and 3x texture samples of BLOOM_APPROX and HALATION_BLUR in
|
|
// later passes (static option only for now).
|
|
static const bool beam_misconvergence = true;
|
|
// Convergence offsets in x/y directions for R/G/B scanline beams in units
|
|
// of scanlines. Positive offsets go right/down; ranges [-2, 2]
|
|
static const float2 convergence_offsets_r_static = float2(0.1, 0.2);
|
|
static const float2 convergence_offsets_g_static = float2(0.3, 0.4);
|
|
static const float2 convergence_offsets_b_static = float2(0.5, 0.6);
|
|
// Detect interlacing (static option only for now)?
|
|
static const bool interlace_detect = true;
|
|
// Assume 1080-line sources are interlaced?
|
|
static const bool interlace_1080i_static = false;
|
|
// For interlaced sources, assume TFF (top-field first) or BFF order?
|
|
// (Whether this matters depends on the nature of the interlaced input.)
|
|
static const bool interlace_bff_static = false;
|
|
|
|
// ANTIALIASING:
|
|
// What AA level do you want for curvature/overscan/subpixels? Options:
|
|
// 0x (none), 1x (sample subpixels), 4x, 5x, 6x, 7x, 8x, 12x, 16x, 20x, 24x
|
|
// (Static option only for now)
|
|
static const float aa_level = 12.0; // range [0, 24]
|
|
// What antialiasing filter do you want (static option only)? Options:
|
|
// 0: Box (separable), 1: Box (cylindrical),
|
|
// 2: Tent (separable), 3: Tent (cylindrical),
|
|
// 4: Gaussian (separable), 5: Gaussian (cylindrical),
|
|
// 6: Cubic* (separable), 7: Cubic* (cylindrical, poor)
|
|
// 8: Lanczos Sinc (separable), 9: Lanczos Jinc (cylindrical, poor)
|
|
// * = Especially slow with RUNTIME_ANTIALIAS_WEIGHTS
|
|
static const float aa_filter = 6.0; // range [0, 9]
|
|
// Flip the sample grid on odd/even frames (static option only for now)?
|
|
static const bool aa_temporal = false;
|
|
// Use RGB subpixel offsets for antialiasing? The pixel is at green, and
|
|
// the blue offset is the negative r offset; range [0, 0.5]
|
|
static const float2 aa_subpixel_r_offset_static = float2(-1.0/3.0, 0.0);//float2(0.0);
|
|
// Cubics: See http://www.imagemagick.org/Usage/filter/#mitchell
|
|
// 1.) "Keys cubics" with B = 1 - 2C are considered the highest quality.
|
|
// 2.) C = 0.5 (default) is Catmull-Rom; higher C's apply sharpening.
|
|
// 3.) C = 1.0/3.0 is the Mitchell-Netravali filter.
|
|
// 4.) C = 0.0 is a soft spline filter.
|
|
static const float aa_cubic_c_static = 0.5; // range [0, 4]
|
|
// Standard deviation for Gaussian antialiasing: Try 0.5/aa_pixel_diameter.
|
|
static const float aa_gauss_sigma_static = 0.5; // range [0.0625, 1.0]
|
|
|
|
// PHOSPHOR MASK:
|
|
// Mask type: 0 = aperture grille, 1 = slot mask, 2 = EDP shadow mask
|
|
static const float mask_type_static = 1.0; // range [0, 2]
|
|
// We can sample the mask three ways. Pick 2/3 from: Pretty/Fast/Flexible.
|
|
// 0.) Sinc-resize to the desired dot pitch manually (pretty/slow/flexible).
|
|
// This requires PHOSPHOR_MASK_MANUALLY_RESIZE to be #defined.
|
|
// 1.) Hardware-resize to the desired dot pitch (ugly/fast/flexible). This
|
|
// is halfway decent with LUT mipmapping but atrocious without it.
|
|
// 2.) Tile it without resizing at a 1:1 texel:pixel ratio for flat coords
|
|
// (pretty/fast/inflexible). Each input LUT has a fixed dot pitch.
|
|
// This mode reuses the same masks, so triads will be enormous unless
|
|
// you change the mask LUT filenames in your .cgp file.
|
|
static const float mask_sample_mode_static = 0.0; // range [0, 2]
|
|
// Prefer setting the triad size (0.0) or number on the screen (1.0)?
|
|
// If RUNTIME_PHOSPHOR_BLOOM_SIGMA isn't #defined, the specified triad size
|
|
// will always be used to calculate the full bloom sigma statically.
|
|
static const float mask_specify_num_triads_static = 0.0; // range [0, 1]
|
|
// Specify the phosphor triad size, in pixels. Each tile (usually with 8
|
|
// triads) will be rounded to the nearest integer tile size and clamped to
|
|
// obey minimum size constraints (imposed to reduce downsize taps) and
|
|
// maximum size constraints (imposed to have a sane MASK_RESIZE FBO size).
|
|
// To increase the size limit, double the viewport-relative scales for the
|
|
// two MASK_RESIZE passes in crt-royale.cgp and user-cgp-contants.h.
|
|
// range [1, mask_texture_small_size/mask_triads_per_tile]
|
|
static const float mask_triad_size_desired_static = 24.0 / 8.0;
|
|
// If mask_specify_num_triads is 1.0/true, we'll go by this instead (the
|
|
// final size will be rounded and constrained as above); default 480.0
|
|
static const float mask_num_triads_desired_static = 480.0;
|
|
// How many lobes should the sinc/Lanczos resizer use? More lobes require
|
|
// more samples and avoid moire a bit better, but some is unavoidable
|
|
// depending on the destination size (static option for now).
|
|
static const float mask_sinc_lobes = 3.0; // range [2, 4]
|
|
// The mask is resized using a variable number of taps in each dimension,
|
|
// but some Cg profiles always fetch a constant number of taps no matter
|
|
// what (no dynamic branching). We can limit the maximum number of taps if
|
|
// we statically limit the minimum phosphor triad size. Larger values are
|
|
// faster, but the limit IS enforced (static option only, forever);
|
|
// range [1, mask_texture_small_size/mask_triads_per_tile]
|
|
// TODO: Make this 1.0 and compensate with smarter sampling!
|
|
static const float mask_min_allowed_triad_size = 2.0;
|
|
|
|
// GEOMETRY:
|
|
// Geometry mode:
|
|
// 0: Off (default), 1: Spherical mapping (like cgwg's),
|
|
// 2: Alt. spherical mapping (more bulbous), 3: Cylindrical/Trinitron
|
|
static const float geom_mode_static = 0.0; // range [0, 3]
|
|
// Radius of curvature: Measured in units of your viewport's diagonal size.
|
|
static const float geom_radius_static = 2.0; // range [1/(2*pi), 1024]
|
|
// View dist is the distance from the player to their physical screen, in
|
|
// units of the viewport's diagonal size. It controls the field of view.
|
|
static const float geom_view_dist_static = 2.0; // range [0.5, 1024]
|
|
// Tilt angle in radians (clockwise around up and right vectors):
|
|
static const float2 geom_tilt_angle_static = float2(0.0, 0.0); // range [-pi, pi]
|
|
// Aspect ratio: When the true viewport size is unknown, this value is used
|
|
// to help convert between the phosphor triad size and count, along with
|
|
// the mask_resize_viewport_scale constant from user-cgp-constants.h. Set
|
|
// this equal to Retroarch's display aspect ratio (DAR) for best results;
|
|
// range [1, geom_max_aspect_ratio from user-cgp-constants.h];
|
|
// default (256/224)*(54/47) = 1.313069909 (see below)
|
|
static const float geom_aspect_ratio_static = 1.313069909;
|
|
// Before getting into overscan, here's some general aspect ratio info:
|
|
// - DAR = display aspect ratio = SAR * PAR; as in your Retroarch setting
|
|
// - SAR = storage aspect ratio = DAR / PAR; square pixel emulator frame AR
|
|
// - PAR = pixel aspect ratio = DAR / SAR; holds regardless of cropping
|
|
// Geometry processing has to "undo" the screen-space 2D DAR to calculate
|
|
// 3D view vectors, then reapplies the aspect ratio to the simulated CRT in
|
|
// uv-space. To ensure the source SAR is intended for a ~4:3 DAR, either:
|
|
// a.) Enable Retroarch's "Crop Overscan"
|
|
// b.) Readd horizontal padding: Set overscan to e.g. N*(1.0, 240.0/224.0)
|
|
// Real consoles use horizontal black padding in the signal, but emulators
|
|
// often crop this without cropping the vertical padding; a 256x224 [S]NES
|
|
// frame (8:7 SAR) is intended for a ~4:3 DAR, but a 256x240 frame is not.
|
|
// The correct [S]NES PAR is 54:47, found by blargg and NewRisingSun:
|
|
// http://board.zsnes.com/phpBB3/viewtopic.php?f=22&t=11928&start=50
|
|
// http://forums.nesdev.com/viewtopic.php?p=24815#p24815
|
|
// For flat output, it's okay to set DAR = [existing] SAR * [correct] PAR
|
|
// without doing a. or b., but horizontal image borders will be tighter
|
|
// than vertical ones, messing up curvature and overscan. Fixing the
|
|
// padding first corrects this.
|
|
// Overscan: Amount to "zoom in" before cropping. You can zoom uniformly
|
|
// or adjust x/y independently to e.g. readd horizontal padding, as noted
|
|
// above: Values < 1.0 zoom out; range (0, inf)
|
|
static const float2 geom_overscan_static = float2(1.0, 1.0);// * 1.005 * (1.0, 240/224.0)
|
|
// Compute a proper pixel-space to texture-space matrix even without ddx()/
|
|
// ddy()? This is ~8.5% slower but improves antialiasing/subpixel filtering
|
|
// with strong curvature (static option only for now).
|
|
static const bool geom_force_correct_tangent_matrix = true;
|
|
|
|
// BORDERS:
|
|
// Rounded border size in texture uv coords:
|
|
static const float border_size_static = 0.015; // range [0, 0.5]
|
|
// Border darkness: Moderate values darken the border smoothly, and high
|
|
// values make the image very dark just inside the border:
|
|
static const float border_darkness_static = 2.0; // range [0, inf)
|
|
// Border compression: High numbers compress border transitions, narrowing
|
|
// the dark border area.
|
|
static const float border_compress_static = 2.5; // range [1, inf)
|
|
|
|
|
|
#endif // USER_SETTINGS_H
|
|
|
|
///////////////////////////// END USER-SETTINGS ////////////////////////////
|
|
|
|
//#include "user-cgp-constants.h"
|
|
|
|
///////////////////////// BEGIN USER-CGP-CONSTANTS /////////////////////////
|
|
|
|
#ifndef USER_CGP_CONSTANTS_H
|
|
#define USER_CGP_CONSTANTS_H
|
|
|
|
// IMPORTANT:
|
|
// These constants MUST be set appropriately for the settings in crt-royale.cgp
|
|
// (or whatever related .cgp file you're using). If they aren't, you're likely
|
|
// to get artifacts, the wrong phosphor mask size, etc. I wish these could be
|
|
// set directly in the .cgp file to make things easier, but...they can't.
|
|
|
|
// PASS SCALES AND RELATED CONSTANTS:
|
|
// Copy the absolute scale_x for BLOOM_APPROX. There are two major versions of
|
|
// this shader: One does a viewport-scale bloom, and the other skips it. The
|
|
// latter benefits from a higher bloom_approx_scale_x, so save both separately:
|
|
static const float bloom_approx_size_x = 320.0;
|
|
static const float bloom_approx_size_x_for_fake = 400.0;
|
|
// Copy the viewport-relative scales of the phosphor mask resize passes
|
|
// (MASK_RESIZE and the pass immediately preceding it):
|
|
static const float2 mask_resize_viewport_scale = float2(0.0625, 0.0625);
|
|
// Copy the geom_max_aspect_ratio used to calculate the MASK_RESIZE scales, etc.:
|
|
static const float geom_max_aspect_ratio = 4.0/3.0;
|
|
|
|
// PHOSPHOR MASK TEXTURE CONSTANTS:
|
|
// Set the following constants to reflect the properties of the phosphor mask
|
|
// texture named in crt-royale.cgp. The shader optionally resizes a mask tile
|
|
// based on user settings, then repeats a single tile until filling the screen.
|
|
// The shader must know the input texture size (default 64x64), and to manually
|
|
// resize, it must also know the horizontal triads per tile (default 8).
|
|
static const float2 mask_texture_small_size = float2(64.0, 64.0);
|
|
static const float2 mask_texture_large_size = float2(512.0, 512.0);
|
|
static const float mask_triads_per_tile = 8.0;
|
|
// We need the average brightness of the phosphor mask to compensate for the
|
|
// dimming it causes. The following four values are roughly correct for the
|
|
// masks included with the shader. Update the value for any LUT texture you
|
|
// change. [Un]comment "#define PHOSPHOR_MASK_GRILLE14" depending on whether
|
|
// the loaded aperture grille uses 14-pixel or 15-pixel stripes (default 15).
|
|
//#define PHOSPHOR_MASK_GRILLE14
|
|
static const float mask_grille14_avg_color = 50.6666666/255.0;
|
|
// TileableLinearApertureGrille14Wide7d33Spacing*.png
|
|
// TileableLinearApertureGrille14Wide10And6Spacing*.png
|
|
static const float mask_grille15_avg_color = 53.0/255.0;
|
|
// TileableLinearApertureGrille15Wide6d33Spacing*.png
|
|
// TileableLinearApertureGrille15Wide8And5d5Spacing*.png
|
|
static const float mask_slot_avg_color = 46.0/255.0;
|
|
// TileableLinearSlotMask15Wide9And4d5Horizontal8VerticalSpacing*.png
|
|
// TileableLinearSlotMaskTall15Wide9And4d5Horizontal9d14VerticalSpacing*.png
|
|
static const float mask_shadow_avg_color = 41.0/255.0;
|
|
// TileableLinearShadowMask*.png
|
|
// TileableLinearShadowMaskEDP*.png
|
|
|
|
#ifdef PHOSPHOR_MASK_GRILLE14
|
|
static const float mask_grille_avg_color = mask_grille14_avg_color;
|
|
#else
|
|
static const float mask_grille_avg_color = mask_grille15_avg_color;
|
|
#endif
|
|
|
|
|
|
#endif // USER_CGP_CONSTANTS_H
|
|
|
|
////////////////////////// END USER-CGP-CONSTANTS //////////////////////////
|
|
|
|
//////////////////////////////// END INCLUDES ////////////////////////////////
|
|
|
|
/////////////////////////////// FIXED SETTINGS ///////////////////////////////
|
|
|
|
// Avoid dividing by zero; using a macro overloads for float, float2, etc.:
|
|
#define FIX_ZERO(c) (max(abs(c), 0.0000152587890625)) // 2^-16
|
|
|
|
// Ensure the first pass decodes CRT gamma and the last encodes LCD gamma.
|
|
#ifndef SIMULATE_CRT_ON_LCD
|
|
#define SIMULATE_CRT_ON_LCD
|
|
#endif
|
|
|
|
// Manually tiling a manually resized texture creates texture coord derivative
|
|
// discontinuities and confuses anisotropic filtering, causing discolored tile
|
|
// seams in the phosphor mask. Workarounds:
|
|
// a.) Using tex2Dlod disables anisotropic filtering for tiled masks. It's
|
|
// downgraded to tex2Dbias without DRIVERS_ALLOW_TEX2DLOD #defined and
|
|
// disabled without DRIVERS_ALLOW_TEX2DBIAS #defined either.
|
|
// b.) "Tile flat twice" requires drawing two full tiles without border padding
|
|
// to the resized mask FBO, and it's incompatible with same-pass curvature.
|
|
// (Same-pass curvature isn't used but could be in the future...maybe.)
|
|
// c.) "Fix discontinuities" requires derivatives and drawing one tile with
|
|
// border padding to the resized mask FBO, but it works with same-pass
|
|
// curvature. It's disabled without DRIVERS_ALLOW_DERIVATIVES #defined.
|
|
// Precedence: a, then, b, then c (if multiple strategies are #defined).
|
|
#define ANISOTROPIC_TILING_COMPAT_TEX2DLOD // 129.7 FPS, 4x, flat; 101.8 at fullscreen
|
|
#define ANISOTROPIC_TILING_COMPAT_TILE_FLAT_TWICE // 128.1 FPS, 4x, flat; 101.5 at fullscreen
|
|
#define ANISOTROPIC_TILING_COMPAT_FIX_DISCONTINUITIES // 124.4 FPS, 4x, flat; 97.4 at fullscreen
|
|
// Also, manually resampling the phosphor mask is slightly blurrier with
|
|
// anisotropic filtering. (Resampling with mipmapping is even worse: It
|
|
// creates artifacts, but only with the fully bloomed shader.) The difference
|
|
// is subtle with small triads, but you can fix it for a small cost.
|
|
//#define ANISOTROPIC_RESAMPLING_COMPAT_TEX2DLOD
|
|
|
|
|
|
////////////////////////////// DERIVED SETTINGS //////////////////////////////
|
|
|
|
// Intel HD 4000 GPU's can't handle manual mask resizing (for now), setting the
|
|
// geometry mode at runtime, or a 4x4 true Gaussian resize. Disable
|
|
// incompatible settings ASAP. (INTEGRATED_GRAPHICS_COMPATIBILITY_MODE may be
|
|
// #defined by either user-settings.h or a wrapper .cg that #includes the
|
|
// current .cg pass.)
|
|
#ifdef INTEGRATED_GRAPHICS_COMPATIBILITY_MODE
|
|
#ifdef PHOSPHOR_MASK_MANUALLY_RESIZE
|
|
#undef PHOSPHOR_MASK_MANUALLY_RESIZE
|
|
#endif
|
|
#ifdef RUNTIME_GEOMETRY_MODE
|
|
#undef RUNTIME_GEOMETRY_MODE
|
|
#endif
|
|
// Mode 2 (4x4 Gaussian resize) won't work, and mode 1 (3x3 blur) is
|
|
// inferior in most cases, so replace 2.0 with 0.0:
|
|
static const float bloom_approx_filter =
|
|
bloom_approx_filter_static > 1.5 ? 0.0 : bloom_approx_filter_static;
|
|
#else
|
|
static const float bloom_approx_filter = bloom_approx_filter_static;
|
|
#endif
|
|
|
|
// Disable slow runtime paths if static parameters are used. Most of these
|
|
// won't be a problem anyway once the params are disabled, but some will.
|
|
#ifndef RUNTIME_SHADER_PARAMS_ENABLE
|
|
#ifdef RUNTIME_PHOSPHOR_BLOOM_SIGMA
|
|
#undef RUNTIME_PHOSPHOR_BLOOM_SIGMA
|
|
#endif
|
|
#ifdef RUNTIME_ANTIALIAS_WEIGHTS
|
|
#undef RUNTIME_ANTIALIAS_WEIGHTS
|
|
#endif
|
|
#ifdef RUNTIME_ANTIALIAS_SUBPIXEL_OFFSETS
|
|
#undef RUNTIME_ANTIALIAS_SUBPIXEL_OFFSETS
|
|
#endif
|
|
#ifdef RUNTIME_SCANLINES_HORIZ_FILTER_COLORSPACE
|
|
#undef RUNTIME_SCANLINES_HORIZ_FILTER_COLORSPACE
|
|
#endif
|
|
#ifdef RUNTIME_GEOMETRY_TILT
|
|
#undef RUNTIME_GEOMETRY_TILT
|
|
#endif
|
|
#ifdef RUNTIME_GEOMETRY_MODE
|
|
#undef RUNTIME_GEOMETRY_MODE
|
|
#endif
|
|
#ifdef FORCE_RUNTIME_PHOSPHOR_MASK_MODE_TYPE_SELECT
|
|
#undef FORCE_RUNTIME_PHOSPHOR_MASK_MODE_TYPE_SELECT
|
|
#endif
|
|
#endif
|
|
|
|
// Make tex2Dbias a backup for tex2Dlod for wider compatibility.
|
|
#ifdef ANISOTROPIC_TILING_COMPAT_TEX2DLOD
|
|
#define ANISOTROPIC_TILING_COMPAT_TEX2DBIAS
|
|
#endif
|
|
#ifdef ANISOTROPIC_RESAMPLING_COMPAT_TEX2DLOD
|
|
#define ANISOTROPIC_RESAMPLING_COMPAT_TEX2DBIAS
|
|
#endif
|
|
// Rule out unavailable anisotropic compatibility strategies:
|
|
#ifndef DRIVERS_ALLOW_DERIVATIVES
|
|
#ifdef ANISOTROPIC_TILING_COMPAT_FIX_DISCONTINUITIES
|
|
#undef ANISOTROPIC_TILING_COMPAT_FIX_DISCONTINUITIES
|
|
#endif
|
|
#endif
|
|
#ifndef DRIVERS_ALLOW_TEX2DLOD
|
|
#ifdef ANISOTROPIC_TILING_COMPAT_TEX2DLOD
|
|
#undef ANISOTROPIC_TILING_COMPAT_TEX2DLOD
|
|
#endif
|
|
#ifdef ANISOTROPIC_RESAMPLING_COMPAT_TEX2DLOD
|
|
#undef ANISOTROPIC_RESAMPLING_COMPAT_TEX2DLOD
|
|
#endif
|
|
#ifdef ANTIALIAS_DISABLE_ANISOTROPIC
|
|
#undef ANTIALIAS_DISABLE_ANISOTROPIC
|
|
#endif
|
|
#endif
|
|
#ifndef DRIVERS_ALLOW_TEX2DBIAS
|
|
#ifdef ANISOTROPIC_TILING_COMPAT_TEX2DBIAS
|
|
#undef ANISOTROPIC_TILING_COMPAT_TEX2DBIAS
|
|
#endif
|
|
#ifdef ANISOTROPIC_RESAMPLING_COMPAT_TEX2DBIAS
|
|
#undef ANISOTROPIC_RESAMPLING_COMPAT_TEX2DBIAS
|
|
#endif
|
|
#endif
|
|
// Prioritize anisotropic tiling compatibility strategies by performance and
|
|
// disable unused strategies. This concentrates all the nesting in one place.
|
|
#ifdef ANISOTROPIC_TILING_COMPAT_TEX2DLOD
|
|
#ifdef ANISOTROPIC_TILING_COMPAT_TEX2DBIAS
|
|
#undef ANISOTROPIC_TILING_COMPAT_TEX2DBIAS
|
|
#endif
|
|
#ifdef ANISOTROPIC_TILING_COMPAT_TILE_FLAT_TWICE
|
|
#undef ANISOTROPIC_TILING_COMPAT_TILE_FLAT_TWICE
|
|
#endif
|
|
#ifdef ANISOTROPIC_TILING_COMPAT_FIX_DISCONTINUITIES
|
|
#undef ANISOTROPIC_TILING_COMPAT_FIX_DISCONTINUITIES
|
|
#endif
|
|
#else
|
|
#ifdef ANISOTROPIC_TILING_COMPAT_TEX2DBIAS
|
|
#ifdef ANISOTROPIC_TILING_COMPAT_TILE_FLAT_TWICE
|
|
#undef ANISOTROPIC_TILING_COMPAT_TILE_FLAT_TWICE
|
|
#endif
|
|
#ifdef ANISOTROPIC_TILING_COMPAT_FIX_DISCONTINUITIES
|
|
#undef ANISOTROPIC_TILING_COMPAT_FIX_DISCONTINUITIES
|
|
#endif
|
|
#else
|
|
// ANISOTROPIC_TILING_COMPAT_TILE_FLAT_TWICE is only compatible with
|
|
// flat texture coords in the same pass, but that's all we use.
|
|
#ifdef ANISOTROPIC_TILING_COMPAT_TILE_FLAT_TWICE
|
|
#ifdef ANISOTROPIC_TILING_COMPAT_FIX_DISCONTINUITIES
|
|
#undef ANISOTROPIC_TILING_COMPAT_FIX_DISCONTINUITIES
|
|
#endif
|
|
#endif
|
|
#endif
|
|
#endif
|
|
// The tex2Dlod and tex2Dbias strategies share a lot in common, and we can
|
|
// reduce some #ifdef nesting in the next section by essentially OR'ing them:
|
|
#ifdef ANISOTROPIC_TILING_COMPAT_TEX2DLOD
|
|
#define ANISOTROPIC_TILING_COMPAT_TEX2DLOD_FAMILY
|
|
#endif
|
|
#ifdef ANISOTROPIC_TILING_COMPAT_TEX2DBIAS
|
|
#define ANISOTROPIC_TILING_COMPAT_TEX2DLOD_FAMILY
|
|
#endif
|
|
// Prioritize anisotropic resampling compatibility strategies the same way:
|
|
#ifdef ANISOTROPIC_RESAMPLING_COMPAT_TEX2DLOD
|
|
#ifdef ANISOTROPIC_RESAMPLING_COMPAT_TEX2DBIAS
|
|
#undef ANISOTROPIC_RESAMPLING_COMPAT_TEX2DBIAS
|
|
#endif
|
|
#endif
|
|
|
|
|
|
/////////////////////// DERIVED PHOSPHOR MASK CONSTANTS //////////////////////
|
|
|
|
// If we can use the large mipmapped LUT without mipmapping artifacts, we
|
|
// should: It gives us more options for using fewer samples.
|
|
#ifdef DRIVERS_ALLOW_TEX2DLOD
|
|
#ifdef ANISOTROPIC_RESAMPLING_COMPAT_TEX2DLOD
|
|
// TODO: Take advantage of this!
|
|
#define PHOSPHOR_MASK_RESIZE_MIPMAPPED_LUT
|
|
static const float2 mask_resize_src_lut_size = mask_texture_large_size;
|
|
#else
|
|
static const float2 mask_resize_src_lut_size = mask_texture_small_size;
|
|
#endif
|
|
#else
|
|
static const float2 mask_resize_src_lut_size = mask_texture_small_size;
|
|
#endif
|
|
|
|
|
|
// tex2D's sampler2D parameter MUST be a uniform global, a uniform input to
|
|
// main_fragment, or a static alias of one of the above. This makes it hard
|
|
// to select the phosphor mask at runtime: We can't even assign to a uniform
|
|
// global in the vertex shader or select a sampler2D in the vertex shader and
|
|
// pass it to the fragment shader (even with explicit TEXUNIT# bindings),
|
|
// because it just gives us the input texture or a black screen. However, we
|
|
// can get around these limitations by calling tex2D three times with different
|
|
// uniform samplers (or resizing the phosphor mask three times altogether).
|
|
// With dynamic branches, we can process only one of these branches on top of
|
|
// quickly discarding fragments we don't need (cgc seems able to overcome
|
|
// limigations around dependent texture fetches inside of branches). Without
|
|
// dynamic branches, we have to process every branch for every fragment...which
|
|
// is slower. Runtime sampling mode selection is slower without dynamic
|
|
// branches as well. Let the user's static #defines decide if it's worth it.
|
|
#ifdef DRIVERS_ALLOW_DYNAMIC_BRANCHES
|
|
#define RUNTIME_PHOSPHOR_MASK_MODE_TYPE_SELECT
|
|
#else
|
|
#ifdef FORCE_RUNTIME_PHOSPHOR_MASK_MODE_TYPE_SELECT
|
|
#define RUNTIME_PHOSPHOR_MASK_MODE_TYPE_SELECT
|
|
#endif
|
|
#endif
|
|
|
|
// We need to render some minimum number of tiles in the resize passes.
|
|
// We need at least 1.0 just to repeat a single tile, and we need extra
|
|
// padding beyond that for anisotropic filtering, discontinuitity fixing,
|
|
// antialiasing, same-pass curvature (not currently used), etc. First
|
|
// determine how many border texels and tiles we need, based on how the result
|
|
// will be sampled:
|
|
#ifdef GEOMETRY_EARLY
|
|
static const float max_subpixel_offset = aa_subpixel_r_offset_static.x;
|
|
// Most antialiasing filters have a base radius of 4.0 pixels:
|
|
static const float max_aa_base_pixel_border = 4.0 +
|
|
max_subpixel_offset;
|
|
#else
|
|
static const float max_aa_base_pixel_border = 0.0;
|
|
#endif
|
|
// Anisotropic filtering adds about 0.5 to the pixel border:
|
|
#ifndef ANISOTROPIC_TILING_COMPAT_TEX2DLOD_FAMILY
|
|
static const float max_aniso_pixel_border = max_aa_base_pixel_border + 0.5;
|
|
#else
|
|
static const float max_aniso_pixel_border = max_aa_base_pixel_border;
|
|
#endif
|
|
// Fixing discontinuities adds 1.0 more to the pixel border:
|
|
#ifdef ANISOTROPIC_TILING_COMPAT_FIX_DISCONTINUITIES
|
|
static const float max_tiled_pixel_border = max_aniso_pixel_border + 1.0;
|
|
#else
|
|
static const float max_tiled_pixel_border = max_aniso_pixel_border;
|
|
#endif
|
|
// Convert the pixel border to an integer texel border. Assume same-pass
|
|
// curvature about triples the texel frequency:
|
|
#ifdef GEOMETRY_EARLY
|
|
static const float max_mask_texel_border =
|
|
ceil(max_tiled_pixel_border * 3.0);
|
|
#else
|
|
static const float max_mask_texel_border = ceil(max_tiled_pixel_border);
|
|
#endif
|
|
// Convert the texel border to a tile border using worst-case assumptions:
|
|
static const float max_mask_tile_border = max_mask_texel_border/
|
|
(mask_min_allowed_triad_size * mask_triads_per_tile);
|
|
|
|
// Finally, set the number of resized tiles to render to MASK_RESIZE, and set
|
|
// the starting texel (inside borders) for sampling it.
|
|
#ifndef GEOMETRY_EARLY
|
|
#ifdef ANISOTROPIC_TILING_COMPAT_TILE_FLAT_TWICE
|
|
// Special case: Render two tiles without borders. Anisotropic
|
|
// filtering doesn't seem to be a problem here.
|
|
static const float mask_resize_num_tiles = 1.0 + 1.0;
|
|
static const float mask_start_texels = 0.0;
|
|
#else
|
|
static const float mask_resize_num_tiles = 1.0 +
|
|
2.0 * max_mask_tile_border;
|
|
static const float mask_start_texels = max_mask_texel_border;
|
|
#endif
|
|
#else
|
|
static const float mask_resize_num_tiles = 1.0 + 2.0*max_mask_tile_border;
|
|
static const float mask_start_texels = max_mask_texel_border;
|
|
#endif
|
|
|
|
// We have to fit mask_resize_num_tiles into an FBO with a viewport scale of
|
|
// mask_resize_viewport_scale. This limits the maximum final triad size.
|
|
// Estimate the minimum number of triads we can split the screen into in each
|
|
// dimension (we'll be as correct as mask_resize_viewport_scale is):
|
|
static const float mask_resize_num_triads =
|
|
mask_resize_num_tiles * mask_triads_per_tile;
|
|
static const float2 min_allowed_viewport_triads =
|
|
float2(mask_resize_num_triads) / mask_resize_viewport_scale;
|
|
|
|
|
|
//////////////////////// COMMON MATHEMATICAL CONSTANTS ///////////////////////
|
|
|
|
static const float pi = 3.141592653589;
|
|
// We often want to find the location of the previous texel, e.g.:
|
|
// const float2 curr_texel = uv * texture_size;
|
|
// const float2 prev_texel = floor(curr_texel - float2(0.5)) + float2(0.5);
|
|
// const float2 prev_texel_uv = prev_texel / texture_size;
|
|
// However, many GPU drivers round incorrectly around exact texel locations.
|
|
// We need to subtract a little less than 0.5 before flooring, and some GPU's
|
|
// require this value to be farther from 0.5 than others; define it here.
|
|
// const float2 prev_texel =
|
|
// floor(curr_texel - float2(under_half)) + float2(0.5);
|
|
static const float under_half = 0.4995;
|
|
|
|
|
|
#endif // DERIVED_SETTINGS_AND_CONSTANTS_H
|
|
|
|
///////////////////////////// END DERIVED-SETTINGS-AND-CONSTANTS ////////////////////////////
|
|
|
|
//#include "bind-shader-params.h"
|
|
|
|
///////////////////////////// BEGIN BIND-SHADER-PARAMS ////////////////////////////
|
|
|
|
#ifndef BIND_SHADER_PARAMS_H
|
|
#define BIND_SHADER_PARAMS_H
|
|
|
|
///////////////////////////// GPL LICENSE NOTICE /////////////////////////////
|
|
|
|
// crt-royale: A full-featured CRT shader, with cheese.
|
|
// Copyright (C) 2014 TroggleMonkey <trogglemonkey@gmx.com>
|
|
//
|
|
// This program is free software; you can redistribute it and/or modify it
|
|
// under the terms of the GNU General Public License as published by the Free
|
|
// Software Foundation; either version 2 of the License, or any later version.
|
|
//
|
|
// This program is distributed in the hope that it will be useful, but WITHOUT
|
|
// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
|
// more details.
|
|
//
|
|
// You should have received a copy of the GNU General Public License along with
|
|
// this program; if not, write to the Free Software Foundation, Inc., 59 Temple
|
|
// Place, Suite 330, Boston, MA 02111-1307 USA
|
|
|
|
|
|
///////////////////////////// SETTINGS MANAGEMENT ////////////////////////////
|
|
|
|
/////////////////////////////// BEGIN INCLUDES ///////////////////////////////
|
|
|
|
//#include "../user-settings.h"
|
|
|
|
///////////////////////////// BEGIN USER-SETTINGS ////////////////////////////
|
|
|
|
#ifndef USER_SETTINGS_H
|
|
#define USER_SETTINGS_H
|
|
|
|
///////////////////////////// DRIVER CAPABILITIES ////////////////////////////
|
|
|
|
// The Cg compiler uses different "profiles" with different capabilities.
|
|
// This shader requires a Cg compilation profile >= arbfp1, but a few options
|
|
// require higher profiles like fp30 or fp40. The shader can't detect profile
|
|
// or driver capabilities, so instead you must comment or uncomment the lines
|
|
// below with "//" before "#define." Disable an option if you get compilation
|
|
// errors resembling those listed. Generally speaking, all of these options
|
|
// will run on nVidia cards, but only DRIVERS_ALLOW_TEX2DBIAS (if that) is
|
|
// likely to run on ATI/AMD, due to the Cg compiler's profile limitations.
|
|
|
|
// Derivatives: Unsupported on fp20, ps_1_1, ps_1_2, ps_1_3, and arbfp1.
|
|
// Among other things, derivatives help us fix anisotropic filtering artifacts
|
|
// with curved manually tiled phosphor mask coords. Related errors:
|
|
// error C3004: function "float2 ddx(float2);" not supported in this profile
|
|
// error C3004: function "float2 ddy(float2);" not supported in this profile
|
|
//#define DRIVERS_ALLOW_DERIVATIVES
|
|
|
|
// Fine derivatives: Unsupported on older ATI cards.
|
|
// Fine derivatives enable 2x2 fragment block communication, letting us perform
|
|
// fast single-pass blur operations. If your card uses coarse derivatives and
|
|
// these are enabled, blurs could look broken. Derivatives are a prerequisite.
|
|
#ifdef DRIVERS_ALLOW_DERIVATIVES
|
|
#define DRIVERS_ALLOW_FINE_DERIVATIVES
|
|
#endif
|
|
|
|
// Dynamic looping: Requires an fp30 or newer profile.
|
|
// This makes phosphor mask resampling faster in some cases. Related errors:
|
|
// error C5013: profile does not support "for" statements and "for" could not
|
|
// be unrolled
|
|
//#define DRIVERS_ALLOW_DYNAMIC_BRANCHES
|
|
|
|
// Without DRIVERS_ALLOW_DYNAMIC_BRANCHES, we need to use unrollable loops.
|
|
// Using one static loop avoids overhead if the user is right, but if the user
|
|
// is wrong (loops are allowed), breaking a loop into if-blocked pieces with a
|
|
// binary search can potentially save some iterations. However, it may fail:
|
|
// error C6001: Temporary register limit of 32 exceeded; 35 registers
|
|
// needed to compile program
|
|
//#define ACCOMODATE_POSSIBLE_DYNAMIC_LOOPS
|
|
|
|
// tex2Dlod: Requires an fp40 or newer profile. This can be used to disable
|
|
// anisotropic filtering, thereby fixing related artifacts. Related errors:
|
|
// error C3004: function "float4 tex2Dlod(sampler2D, float4);" not supported in
|
|
// this profile
|
|
//#define DRIVERS_ALLOW_TEX2DLOD
|
|
|
|
// tex2Dbias: Requires an fp30 or newer profile. This can be used to alleviate
|
|
// artifacts from anisotropic filtering and mipmapping. Related errors:
|
|
// error C3004: function "float4 tex2Dbias(sampler2D, float4);" not supported
|
|
// in this profile
|
|
//#define DRIVERS_ALLOW_TEX2DBIAS
|
|
|
|
// Integrated graphics compatibility: Integrated graphics like Intel HD 4000
|
|
// impose stricter limitations on register counts and instructions. Enable
|
|
// INTEGRATED_GRAPHICS_COMPATIBILITY_MODE if you still see error C6001 or:
|
|
// error C6002: Instruction limit of 1024 exceeded: 1523 instructions needed
|
|
// to compile program.
|
|
// Enabling integrated graphics compatibility mode will automatically disable:
|
|
// 1.) PHOSPHOR_MASK_MANUALLY_RESIZE: The phosphor mask will be softer.
|
|
// (This may be reenabled in a later release.)
|
|
// 2.) RUNTIME_GEOMETRY_MODE
|
|
// 3.) The high-quality 4x4 Gaussian resize for the bloom approximation
|
|
//#define INTEGRATED_GRAPHICS_COMPATIBILITY_MODE
|
|
|
|
|
|
//////////////////////////// USER CODEPATH OPTIONS ///////////////////////////
|
|
|
|
// To disable a #define option, turn its line into a comment with "//."
|
|
|
|
// RUNTIME VS. COMPILE-TIME OPTIONS (Major Performance Implications):
|
|
// Enable runtime shader parameters in the Retroarch (etc.) GUI? They override
|
|
// many of the options in this file and allow real-time tuning, but many of
|
|
// them are slower. Disabling them and using this text file will boost FPS.
|
|
#define RUNTIME_SHADER_PARAMS_ENABLE
|
|
// Specify the phosphor bloom sigma at runtime? This option is 10% slower, but
|
|
// it's the only way to do a wide-enough full bloom with a runtime dot pitch.
|
|
#define RUNTIME_PHOSPHOR_BLOOM_SIGMA
|
|
// Specify antialiasing weight parameters at runtime? (Costs ~20% with cubics)
|
|
#define RUNTIME_ANTIALIAS_WEIGHTS
|
|
// Specify subpixel offsets at runtime? (WARNING: EXTREMELY EXPENSIVE!)
|
|
//#define RUNTIME_ANTIALIAS_SUBPIXEL_OFFSETS
|
|
// Make beam_horiz_filter and beam_horiz_linear_rgb_weight into runtime shader
|
|
// parameters? This will require more math or dynamic branching.
|
|
#define RUNTIME_SCANLINES_HORIZ_FILTER_COLORSPACE
|
|
// Specify the tilt at runtime? This makes things about 3% slower.
|
|
#define RUNTIME_GEOMETRY_TILT
|
|
// Specify the geometry mode at runtime?
|
|
#define RUNTIME_GEOMETRY_MODE
|
|
// Specify the phosphor mask type (aperture grille, slot mask, shadow mask) and
|
|
// mode (Lanczos-resize, hardware resize, or tile 1:1) at runtime, even without
|
|
// dynamic branches? This is cheap if mask_resize_viewport_scale is small.
|
|
#define FORCE_RUNTIME_PHOSPHOR_MASK_MODE_TYPE_SELECT
|
|
|
|
// PHOSPHOR MASK:
|
|
// Manually resize the phosphor mask for best results (slower)? Disabling this
|
|
// removes the option to do so, but it may be faster without dynamic branches.
|
|
#define PHOSPHOR_MASK_MANUALLY_RESIZE
|
|
// If we sinc-resize the mask, should we Lanczos-window it (slower but better)?
|
|
#define PHOSPHOR_MASK_RESIZE_LANCZOS_WINDOW
|
|
// Larger blurs are expensive, but we need them to blur larger triads. We can
|
|
// detect the right blur if the triad size is static or our profile allows
|
|
// dynamic branches, but otherwise we use the largest blur the user indicates
|
|
// they might need:
|
|
#define PHOSPHOR_BLOOM_TRIADS_LARGER_THAN_3_PIXELS
|
|
//#define PHOSPHOR_BLOOM_TRIADS_LARGER_THAN_6_PIXELS
|
|
//#define PHOSPHOR_BLOOM_TRIADS_LARGER_THAN_9_PIXELS
|
|
//#define PHOSPHOR_BLOOM_TRIADS_LARGER_THAN_12_PIXELS
|
|
// Here's a helpful chart:
|
|
// MaxTriadSize BlurSize MinTriadCountsByResolution
|
|
// 3.0 9.0 480/640/960/1920 triads at 1080p/1440p/2160p/4320p, 4:3 aspect
|
|
// 6.0 17.0 240/320/480/960 triads at 1080p/1440p/2160p/4320p, 4:3 aspect
|
|
// 9.0 25.0 160/213/320/640 triads at 1080p/1440p/2160p/4320p, 4:3 aspect
|
|
// 12.0 31.0 120/160/240/480 triads at 1080p/1440p/2160p/4320p, 4:3 aspect
|
|
// 18.0 43.0 80/107/160/320 triads at 1080p/1440p/2160p/4320p, 4:3 aspect
|
|
|
|
|
|
/////////////////////////////// USER PARAMETERS //////////////////////////////
|
|
|
|
// Note: Many of these static parameters are overridden by runtime shader
|
|
// parameters when those are enabled. However, many others are static codepath
|
|
// options that were cleaner or more convert to code as static constants.
|
|
|
|
// GAMMA:
|
|
static const float crt_gamma_static = 2.5; // range [1, 5]
|
|
static const float lcd_gamma_static = 2.2; // range [1, 5]
|
|
|
|
// LEVELS MANAGEMENT:
|
|
// Control the final multiplicative image contrast:
|
|
static const float levels_contrast_static = 1.0; // range [0, 4)
|
|
// We auto-dim to avoid clipping between passes and restore brightness
|
|
// later. Control the dim factor here: Lower values clip less but crush
|
|
// blacks more (static only for now).
|
|
static const float levels_autodim_temp = 0.5; // range (0, 1] default is 0.5 but that was unnecessarily dark for me, so I set it to 1.0
|
|
|
|
// HALATION/DIFFUSION/BLOOM:
|
|
// Halation weight: How much energy should be lost to electrons bounding
|
|
// around under the CRT glass and exciting random phosphors?
|
|
static const float halation_weight_static = 0.0; // range [0, 1]
|
|
// Refractive diffusion weight: How much light should spread/diffuse from
|
|
// refracting through the CRT glass?
|
|
static const float diffusion_weight_static = 0.075; // range [0, 1]
|
|
// Underestimate brightness: Bright areas bloom more, but we can base the
|
|
// bloom brightpass on a lower brightness to sharpen phosphors, or a higher
|
|
// brightness to soften them. Low values clip, but >= 0.8 looks okay.
|
|
static const float bloom_underestimate_levels_static = 0.8; // range [0, 5]
|
|
// Blur all colors more than necessary for a softer phosphor bloom?
|
|
static const float bloom_excess_static = 0.0; // range [0, 1]
|
|
// The BLOOM_APPROX pass approximates a phosphor blur early on with a small
|
|
// blurred resize of the input (convergence offsets are applied as well).
|
|
// There are three filter options (static option only for now):
|
|
// 0.) Bilinear resize: A fast, close approximation to a 4x4 resize
|
|
// if min_allowed_viewport_triads and the BLOOM_APPROX resolution are sane
|
|
// and beam_max_sigma is low.
|
|
// 1.) 3x3 resize blur: Medium speed, soft/smeared from bilinear blurring,
|
|
// always uses a static sigma regardless of beam_max_sigma or
|
|
// mask_num_triads_desired.
|
|
// 2.) True 4x4 Gaussian resize: Slowest, technically correct.
|
|
// These options are more pronounced for the fast, unbloomed shader version.
|
|
#ifndef RADEON_FIX
|
|
static const float bloom_approx_filter_static = 2.0;
|
|
#else
|
|
static const float bloom_approx_filter_static = 1.0;
|
|
#endif
|
|
|
|
// ELECTRON BEAM SCANLINE DISTRIBUTION:
|
|
// How many scanlines should contribute light to each pixel? Using more
|
|
// scanlines is slower (especially for a generalized Gaussian) but less
|
|
// distorted with larger beam sigmas (especially for a pure Gaussian). The
|
|
// max_beam_sigma at which the closest unused weight is guaranteed <
|
|
// 1.0/255.0 (for a 3x antialiased pure Gaussian) is:
|
|
// 2 scanlines: max_beam_sigma = 0.2089; distortions begin ~0.34; 141.7 FPS pure, 131.9 FPS generalized
|
|
// 3 scanlines, max_beam_sigma = 0.3879; distortions begin ~0.52; 137.5 FPS pure; 123.8 FPS generalized
|
|
// 4 scanlines, max_beam_sigma = 0.5723; distortions begin ~0.70; 134.7 FPS pure; 117.2 FPS generalized
|
|
// 5 scanlines, max_beam_sigma = 0.7591; distortions begin ~0.89; 131.6 FPS pure; 112.1 FPS generalized
|
|
// 6 scanlines, max_beam_sigma = 0.9483; distortions begin ~1.08; 127.9 FPS pure; 105.6 FPS generalized
|
|
static const float beam_num_scanlines = 3.0; // range [2, 6]
|
|
// A generalized Gaussian beam varies shape with color too, now just width.
|
|
// It's slower but more flexible (static option only for now).
|
|
static const bool beam_generalized_gaussian = true;
|
|
// What kind of scanline antialiasing do you want?
|
|
// 0: Sample weights at 1x; 1: Sample weights at 3x; 2: Compute an integral
|
|
// Integrals are slow (especially for generalized Gaussians) and rarely any
|
|
// better than 3x antialiasing (static option only for now).
|
|
static const float beam_antialias_level = 1.0; // range [0, 2]
|
|
// Min/max standard deviations for scanline beams: Higher values widen and
|
|
// soften scanlines. Depending on other options, low min sigmas can alias.
|
|
static const float beam_min_sigma_static = 0.02; // range (0, 1]
|
|
static const float beam_max_sigma_static = 0.3; // range (0, 1]
|
|
// Beam width varies as a function of color: A power function (0) is more
|
|
// configurable, but a spherical function (1) gives the widest beam
|
|
// variability without aliasing (static option only for now).
|
|
static const float beam_spot_shape_function = 0.0;
|
|
// Spot shape power: Powers <= 1 give smoother spot shapes but lower
|
|
// sharpness. Powers >= 1.0 are awful unless mix/max sigmas are close.
|
|
static const float beam_spot_power_static = 1.0/3.0; // range (0, 16]
|
|
// Generalized Gaussian max shape parameters: Higher values give flatter
|
|
// scanline plateaus and steeper dropoffs, simultaneously widening and
|
|
// sharpening scanlines at the cost of aliasing. 2.0 is pure Gaussian, and
|
|
// values > ~40.0 cause artifacts with integrals.
|
|
static const float beam_min_shape_static = 2.0; // range [2, 32]
|
|
static const float beam_max_shape_static = 4.0; // range [2, 32]
|
|
// Generalized Gaussian shape power: Affects how quickly the distribution
|
|
// changes shape from Gaussian to steep/plateaued as color increases from 0
|
|
// to 1.0. Higher powers appear softer for most colors, and lower powers
|
|
// appear sharper for most colors.
|
|
static const float beam_shape_power_static = 1.0/4.0; // range (0, 16]
|
|
// What filter should be used to sample scanlines horizontally?
|
|
// 0: Quilez (fast), 1: Gaussian (configurable), 2: Lanczos2 (sharp)
|
|
static const float beam_horiz_filter_static = 0.0;
|
|
// Standard deviation for horizontal Gaussian resampling:
|
|
static const float beam_horiz_sigma_static = 0.35; // range (0, 2/3]
|
|
// Do horizontal scanline sampling in linear RGB (correct light mixing),
|
|
// gamma-encoded RGB (darker, hard spot shape, may better match bandwidth-
|
|
// limiting circuitry in some CRT's), or a weighted avg.?
|
|
static const float beam_horiz_linear_rgb_weight_static = 1.0; // range [0, 1]
|
|
// Simulate scanline misconvergence? This needs 3x horizontal texture
|
|
// samples and 3x texture samples of BLOOM_APPROX and HALATION_BLUR in
|
|
// later passes (static option only for now).
|
|
static const bool beam_misconvergence = true;
|
|
// Convergence offsets in x/y directions for R/G/B scanline beams in units
|
|
// of scanlines. Positive offsets go right/down; ranges [-2, 2]
|
|
static const float2 convergence_offsets_r_static = float2(0.1, 0.2);
|
|
static const float2 convergence_offsets_g_static = float2(0.3, 0.4);
|
|
static const float2 convergence_offsets_b_static = float2(0.5, 0.6);
|
|
// Detect interlacing (static option only for now)?
|
|
static const bool interlace_detect = true;
|
|
// Assume 1080-line sources are interlaced?
|
|
static const bool interlace_1080i_static = false;
|
|
// For interlaced sources, assume TFF (top-field first) or BFF order?
|
|
// (Whether this matters depends on the nature of the interlaced input.)
|
|
static const bool interlace_bff_static = false;
|
|
|
|
// ANTIALIASING:
|
|
// What AA level do you want for curvature/overscan/subpixels? Options:
|
|
// 0x (none), 1x (sample subpixels), 4x, 5x, 6x, 7x, 8x, 12x, 16x, 20x, 24x
|
|
// (Static option only for now)
|
|
static const float aa_level = 12.0; // range [0, 24]
|
|
// What antialiasing filter do you want (static option only)? Options:
|
|
// 0: Box (separable), 1: Box (cylindrical),
|
|
// 2: Tent (separable), 3: Tent (cylindrical),
|
|
// 4: Gaussian (separable), 5: Gaussian (cylindrical),
|
|
// 6: Cubic* (separable), 7: Cubic* (cylindrical, poor)
|
|
// 8: Lanczos Sinc (separable), 9: Lanczos Jinc (cylindrical, poor)
|
|
// * = Especially slow with RUNTIME_ANTIALIAS_WEIGHTS
|
|
static const float aa_filter = 6.0; // range [0, 9]
|
|
// Flip the sample grid on odd/even frames (static option only for now)?
|
|
static const bool aa_temporal = false;
|
|
// Use RGB subpixel offsets for antialiasing? The pixel is at green, and
|
|
// the blue offset is the negative r offset; range [0, 0.5]
|
|
static const float2 aa_subpixel_r_offset_static = float2(-1.0/3.0, 0.0);//float2(0.0);
|
|
// Cubics: See http://www.imagemagick.org/Usage/filter/#mitchell
|
|
// 1.) "Keys cubics" with B = 1 - 2C are considered the highest quality.
|
|
// 2.) C = 0.5 (default) is Catmull-Rom; higher C's apply sharpening.
|
|
// 3.) C = 1.0/3.0 is the Mitchell-Netravali filter.
|
|
// 4.) C = 0.0 is a soft spline filter.
|
|
static const float aa_cubic_c_static = 0.5; // range [0, 4]
|
|
// Standard deviation for Gaussian antialiasing: Try 0.5/aa_pixel_diameter.
|
|
static const float aa_gauss_sigma_static = 0.5; // range [0.0625, 1.0]
|
|
|
|
// PHOSPHOR MASK:
|
|
// Mask type: 0 = aperture grille, 1 = slot mask, 2 = EDP shadow mask
|
|
static const float mask_type_static = 1.0; // range [0, 2]
|
|
// We can sample the mask three ways. Pick 2/3 from: Pretty/Fast/Flexible.
|
|
// 0.) Sinc-resize to the desired dot pitch manually (pretty/slow/flexible).
|
|
// This requires PHOSPHOR_MASK_MANUALLY_RESIZE to be #defined.
|
|
// 1.) Hardware-resize to the desired dot pitch (ugly/fast/flexible). This
|
|
// is halfway decent with LUT mipmapping but atrocious without it.
|
|
// 2.) Tile it without resizing at a 1:1 texel:pixel ratio for flat coords
|
|
// (pretty/fast/inflexible). Each input LUT has a fixed dot pitch.
|
|
// This mode reuses the same masks, so triads will be enormous unless
|
|
// you change the mask LUT filenames in your .cgp file.
|
|
static const float mask_sample_mode_static = 0.0; // range [0, 2]
|
|
// Prefer setting the triad size (0.0) or number on the screen (1.0)?
|
|
// If RUNTIME_PHOSPHOR_BLOOM_SIGMA isn't #defined, the specified triad size
|
|
// will always be used to calculate the full bloom sigma statically.
|
|
static const float mask_specify_num_triads_static = 0.0; // range [0, 1]
|
|
// Specify the phosphor triad size, in pixels. Each tile (usually with 8
|
|
// triads) will be rounded to the nearest integer tile size and clamped to
|
|
// obey minimum size constraints (imposed to reduce downsize taps) and
|
|
// maximum size constraints (imposed to have a sane MASK_RESIZE FBO size).
|
|
// To increase the size limit, double the viewport-relative scales for the
|
|
// two MASK_RESIZE passes in crt-royale.cgp and user-cgp-contants.h.
|
|
// range [1, mask_texture_small_size/mask_triads_per_tile]
|
|
static const float mask_triad_size_desired_static = 24.0 / 8.0;
|
|
// If mask_specify_num_triads is 1.0/true, we'll go by this instead (the
|
|
// final size will be rounded and constrained as above); default 480.0
|
|
static const float mask_num_triads_desired_static = 480.0;
|
|
// How many lobes should the sinc/Lanczos resizer use? More lobes require
|
|
// more samples and avoid moire a bit better, but some is unavoidable
|
|
// depending on the destination size (static option for now).
|
|
static const float mask_sinc_lobes = 3.0; // range [2, 4]
|
|
// The mask is resized using a variable number of taps in each dimension,
|
|
// but some Cg profiles always fetch a constant number of taps no matter
|
|
// what (no dynamic branching). We can limit the maximum number of taps if
|
|
// we statically limit the minimum phosphor triad size. Larger values are
|
|
// faster, but the limit IS enforced (static option only, forever);
|
|
// range [1, mask_texture_small_size/mask_triads_per_tile]
|
|
// TODO: Make this 1.0 and compensate with smarter sampling!
|
|
static const float mask_min_allowed_triad_size = 2.0;
|
|
|
|
// GEOMETRY:
|
|
// Geometry mode:
|
|
// 0: Off (default), 1: Spherical mapping (like cgwg's),
|
|
// 2: Alt. spherical mapping (more bulbous), 3: Cylindrical/Trinitron
|
|
static const float geom_mode_static = 0.0; // range [0, 3]
|
|
// Radius of curvature: Measured in units of your viewport's diagonal size.
|
|
static const float geom_radius_static = 2.0; // range [1/(2*pi), 1024]
|
|
// View dist is the distance from the player to their physical screen, in
|
|
// units of the viewport's diagonal size. It controls the field of view.
|
|
static const float geom_view_dist_static = 2.0; // range [0.5, 1024]
|
|
// Tilt angle in radians (clockwise around up and right vectors):
|
|
static const float2 geom_tilt_angle_static = float2(0.0, 0.0); // range [-pi, pi]
|
|
// Aspect ratio: When the true viewport size is unknown, this value is used
|
|
// to help convert between the phosphor triad size and count, along with
|
|
// the mask_resize_viewport_scale constant from user-cgp-constants.h. Set
|
|
// this equal to Retroarch's display aspect ratio (DAR) for best results;
|
|
// range [1, geom_max_aspect_ratio from user-cgp-constants.h];
|
|
// default (256/224)*(54/47) = 1.313069909 (see below)
|
|
static const float geom_aspect_ratio_static = 1.313069909;
|
|
// Before getting into overscan, here's some general aspect ratio info:
|
|
// - DAR = display aspect ratio = SAR * PAR; as in your Retroarch setting
|
|
// - SAR = storage aspect ratio = DAR / PAR; square pixel emulator frame AR
|
|
// - PAR = pixel aspect ratio = DAR / SAR; holds regardless of cropping
|
|
// Geometry processing has to "undo" the screen-space 2D DAR to calculate
|
|
// 3D view vectors, then reapplies the aspect ratio to the simulated CRT in
|
|
// uv-space. To ensure the source SAR is intended for a ~4:3 DAR, either:
|
|
// a.) Enable Retroarch's "Crop Overscan"
|
|
// b.) Readd horizontal padding: Set overscan to e.g. N*(1.0, 240.0/224.0)
|
|
// Real consoles use horizontal black padding in the signal, but emulators
|
|
// often crop this without cropping the vertical padding; a 256x224 [S]NES
|
|
// frame (8:7 SAR) is intended for a ~4:3 DAR, but a 256x240 frame is not.
|
|
// The correct [S]NES PAR is 54:47, found by blargg and NewRisingSun:
|
|
// http://board.zsnes.com/phpBB3/viewtopic.php?f=22&t=11928&start=50
|
|
// http://forums.nesdev.com/viewtopic.php?p=24815#p24815
|
|
// For flat output, it's okay to set DAR = [existing] SAR * [correct] PAR
|
|
// without doing a. or b., but horizontal image borders will be tighter
|
|
// than vertical ones, messing up curvature and overscan. Fixing the
|
|
// padding first corrects this.
|
|
// Overscan: Amount to "zoom in" before cropping. You can zoom uniformly
|
|
// or adjust x/y independently to e.g. readd horizontal padding, as noted
|
|
// above: Values < 1.0 zoom out; range (0, inf)
|
|
static const float2 geom_overscan_static = float2(1.0, 1.0);// * 1.005 * (1.0, 240/224.0)
|
|
// Compute a proper pixel-space to texture-space matrix even without ddx()/
|
|
// ddy()? This is ~8.5% slower but improves antialiasing/subpixel filtering
|
|
// with strong curvature (static option only for now).
|
|
static const bool geom_force_correct_tangent_matrix = true;
|
|
|
|
// BORDERS:
|
|
// Rounded border size in texture uv coords:
|
|
static const float border_size_static = 0.015; // range [0, 0.5]
|
|
// Border darkness: Moderate values darken the border smoothly, and high
|
|
// values make the image very dark just inside the border:
|
|
static const float border_darkness_static = 2.0; // range [0, inf)
|
|
// Border compression: High numbers compress border transitions, narrowing
|
|
// the dark border area.
|
|
static const float border_compress_static = 2.5; // range [1, inf)
|
|
|
|
|
|
#endif // USER_SETTINGS_H
|
|
|
|
///////////////////////////// END USER-SETTINGS ////////////////////////////
|
|
|
|
//#include "derived-settings-and-constants.h"
|
|
|
|
///////////////////// BEGIN DERIVED-SETTINGS-AND-CONSTANTS ////////////////////
|
|
|
|
#ifndef DERIVED_SETTINGS_AND_CONSTANTS_H
|
|
#define DERIVED_SETTINGS_AND_CONSTANTS_H
|
|
|
|
///////////////////////////// GPL LICENSE NOTICE /////////////////////////////
|
|
|
|
// crt-royale: A full-featured CRT shader, with cheese.
|
|
// Copyright (C) 2014 TroggleMonkey <trogglemonkey@gmx.com>
|
|
//
|
|
// This program is free software; you can redistribute it and/or modify it
|
|
// under the terms of the GNU General Public License as published by the Free
|
|
// Software Foundation; either version 2 of the License, or any later version.
|
|
//
|
|
// This program is distributed in the hope that it will be useful, but WITHOUT
|
|
// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
|
// more details.
|
|
//
|
|
// You should have received a copy of the GNU General Public License along with
|
|
// this program; if not, write to the Free Software Foundation, Inc., 59 Temple
|
|
// Place, Suite 330, Boston, MA 02111-1307 USA
|
|
|
|
|
|
///////////////////////////////// DESCRIPTION ////////////////////////////////
|
|
|
|
// These macros and constants can be used across the whole codebase.
|
|
// Unlike the values in user-settings.cgh, end users shouldn't modify these.
|
|
|
|
|
|
/////////////////////////////// BEGIN INCLUDES ///////////////////////////////
|
|
|
|
//#include "../user-settings.h"
|
|
|
|
///////////////////////////// BEGIN USER-SETTINGS ////////////////////////////
|
|
|
|
#ifndef USER_SETTINGS_H
|
|
#define USER_SETTINGS_H
|
|
|
|
///////////////////////////// DRIVER CAPABILITIES ////////////////////////////
|
|
|
|
// The Cg compiler uses different "profiles" with different capabilities.
|
|
// This shader requires a Cg compilation profile >= arbfp1, but a few options
|
|
// require higher profiles like fp30 or fp40. The shader can't detect profile
|
|
// or driver capabilities, so instead you must comment or uncomment the lines
|
|
// below with "//" before "#define." Disable an option if you get compilation
|
|
// errors resembling those listed. Generally speaking, all of these options
|
|
// will run on nVidia cards, but only DRIVERS_ALLOW_TEX2DBIAS (if that) is
|
|
// likely to run on ATI/AMD, due to the Cg compiler's profile limitations.
|
|
|
|
// Derivatives: Unsupported on fp20, ps_1_1, ps_1_2, ps_1_3, and arbfp1.
|
|
// Among other things, derivatives help us fix anisotropic filtering artifacts
|
|
// with curved manually tiled phosphor mask coords. Related errors:
|
|
// error C3004: function "float2 ddx(float2);" not supported in this profile
|
|
// error C3004: function "float2 ddy(float2);" not supported in this profile
|
|
//#define DRIVERS_ALLOW_DERIVATIVES
|
|
|
|
// Fine derivatives: Unsupported on older ATI cards.
|
|
// Fine derivatives enable 2x2 fragment block communication, letting us perform
|
|
// fast single-pass blur operations. If your card uses coarse derivatives and
|
|
// these are enabled, blurs could look broken. Derivatives are a prerequisite.
|
|
#ifdef DRIVERS_ALLOW_DERIVATIVES
|
|
#define DRIVERS_ALLOW_FINE_DERIVATIVES
|
|
#endif
|
|
|
|
// Dynamic looping: Requires an fp30 or newer profile.
|
|
// This makes phosphor mask resampling faster in some cases. Related errors:
|
|
// error C5013: profile does not support "for" statements and "for" could not
|
|
// be unrolled
|
|
//#define DRIVERS_ALLOW_DYNAMIC_BRANCHES
|
|
|
|
// Without DRIVERS_ALLOW_DYNAMIC_BRANCHES, we need to use unrollable loops.
|
|
// Using one static loop avoids overhead if the user is right, but if the user
|
|
// is wrong (loops are allowed), breaking a loop into if-blocked pieces with a
|
|
// binary search can potentially save some iterations. However, it may fail:
|
|
// error C6001: Temporary register limit of 32 exceeded; 35 registers
|
|
// needed to compile program
|
|
//#define ACCOMODATE_POSSIBLE_DYNAMIC_LOOPS
|
|
|
|
// tex2Dlod: Requires an fp40 or newer profile. This can be used to disable
|
|
// anisotropic filtering, thereby fixing related artifacts. Related errors:
|
|
// error C3004: function "float4 tex2Dlod(sampler2D, float4);" not supported in
|
|
// this profile
|
|
//#define DRIVERS_ALLOW_TEX2DLOD
|
|
|
|
// tex2Dbias: Requires an fp30 or newer profile. This can be used to alleviate
|
|
// artifacts from anisotropic filtering and mipmapping. Related errors:
|
|
// error C3004: function "float4 tex2Dbias(sampler2D, float4);" not supported
|
|
// in this profile
|
|
//#define DRIVERS_ALLOW_TEX2DBIAS
|
|
|
|
// Integrated graphics compatibility: Integrated graphics like Intel HD 4000
|
|
// impose stricter limitations on register counts and instructions. Enable
|
|
// INTEGRATED_GRAPHICS_COMPATIBILITY_MODE if you still see error C6001 or:
|
|
// error C6002: Instruction limit of 1024 exceeded: 1523 instructions needed
|
|
// to compile program.
|
|
// Enabling integrated graphics compatibility mode will automatically disable:
|
|
// 1.) PHOSPHOR_MASK_MANUALLY_RESIZE: The phosphor mask will be softer.
|
|
// (This may be reenabled in a later release.)
|
|
// 2.) RUNTIME_GEOMETRY_MODE
|
|
// 3.) The high-quality 4x4 Gaussian resize for the bloom approximation
|
|
//#define INTEGRATED_GRAPHICS_COMPATIBILITY_MODE
|
|
|
|
|
|
//////////////////////////// USER CODEPATH OPTIONS ///////////////////////////
|
|
|
|
// To disable a #define option, turn its line into a comment with "//."
|
|
|
|
// RUNTIME VS. COMPILE-TIME OPTIONS (Major Performance Implications):
|
|
// Enable runtime shader parameters in the Retroarch (etc.) GUI? They override
|
|
// many of the options in this file and allow real-time tuning, but many of
|
|
// them are slower. Disabling them and using this text file will boost FPS.
|
|
#define RUNTIME_SHADER_PARAMS_ENABLE
|
|
// Specify the phosphor bloom sigma at runtime? This option is 10% slower, but
|
|
// it's the only way to do a wide-enough full bloom with a runtime dot pitch.
|
|
#define RUNTIME_PHOSPHOR_BLOOM_SIGMA
|
|
// Specify antialiasing weight parameters at runtime? (Costs ~20% with cubics)
|
|
#define RUNTIME_ANTIALIAS_WEIGHTS
|
|
// Specify subpixel offsets at runtime? (WARNING: EXTREMELY EXPENSIVE!)
|
|
//#define RUNTIME_ANTIALIAS_SUBPIXEL_OFFSETS
|
|
// Make beam_horiz_filter and beam_horiz_linear_rgb_weight into runtime shader
|
|
// parameters? This will require more math or dynamic branching.
|
|
#define RUNTIME_SCANLINES_HORIZ_FILTER_COLORSPACE
|
|
// Specify the tilt at runtime? This makes things about 3% slower.
|
|
#define RUNTIME_GEOMETRY_TILT
|
|
// Specify the geometry mode at runtime?
|
|
#define RUNTIME_GEOMETRY_MODE
|
|
// Specify the phosphor mask type (aperture grille, slot mask, shadow mask) and
|
|
// mode (Lanczos-resize, hardware resize, or tile 1:1) at runtime, even without
|
|
// dynamic branches? This is cheap if mask_resize_viewport_scale is small.
|
|
#define FORCE_RUNTIME_PHOSPHOR_MASK_MODE_TYPE_SELECT
|
|
|
|
// PHOSPHOR MASK:
|
|
// Manually resize the phosphor mask for best results (slower)? Disabling this
|
|
// removes the option to do so, but it may be faster without dynamic branches.
|
|
#define PHOSPHOR_MASK_MANUALLY_RESIZE
|
|
// If we sinc-resize the mask, should we Lanczos-window it (slower but better)?
|
|
#define PHOSPHOR_MASK_RESIZE_LANCZOS_WINDOW
|
|
// Larger blurs are expensive, but we need them to blur larger triads. We can
|
|
// detect the right blur if the triad size is static or our profile allows
|
|
// dynamic branches, but otherwise we use the largest blur the user indicates
|
|
// they might need:
|
|
#define PHOSPHOR_BLOOM_TRIADS_LARGER_THAN_3_PIXELS
|
|
//#define PHOSPHOR_BLOOM_TRIADS_LARGER_THAN_6_PIXELS
|
|
//#define PHOSPHOR_BLOOM_TRIADS_LARGER_THAN_9_PIXELS
|
|
//#define PHOSPHOR_BLOOM_TRIADS_LARGER_THAN_12_PIXELS
|
|
// Here's a helpful chart:
|
|
// MaxTriadSize BlurSize MinTriadCountsByResolution
|
|
// 3.0 9.0 480/640/960/1920 triads at 1080p/1440p/2160p/4320p, 4:3 aspect
|
|
// 6.0 17.0 240/320/480/960 triads at 1080p/1440p/2160p/4320p, 4:3 aspect
|
|
// 9.0 25.0 160/213/320/640 triads at 1080p/1440p/2160p/4320p, 4:3 aspect
|
|
// 12.0 31.0 120/160/240/480 triads at 1080p/1440p/2160p/4320p, 4:3 aspect
|
|
// 18.0 43.0 80/107/160/320 triads at 1080p/1440p/2160p/4320p, 4:3 aspect
|
|
|
|
|
|
/////////////////////////////// USER PARAMETERS //////////////////////////////
|
|
|
|
// Note: Many of these static parameters are overridden by runtime shader
|
|
// parameters when those are enabled. However, many others are static codepath
|
|
// options that were cleaner or more convert to code as static constants.
|
|
|
|
// GAMMA:
|
|
static const float crt_gamma_static = 2.5; // range [1, 5]
|
|
static const float lcd_gamma_static = 2.2; // range [1, 5]
|
|
|
|
// LEVELS MANAGEMENT:
|
|
// Control the final multiplicative image contrast:
|
|
static const float levels_contrast_static = 1.0; // range [0, 4)
|
|
// We auto-dim to avoid clipping between passes and restore brightness
|
|
// later. Control the dim factor here: Lower values clip less but crush
|
|
// blacks more (static only for now).
|
|
static const float levels_autodim_temp = 0.5; // range (0, 1] default is 0.5 but that was unnecessarily dark for me, so I set it to 1.0
|
|
|
|
// HALATION/DIFFUSION/BLOOM:
|
|
// Halation weight: How much energy should be lost to electrons bounding
|
|
// around under the CRT glass and exciting random phosphors?
|
|
static const float halation_weight_static = 0.0; // range [0, 1]
|
|
// Refractive diffusion weight: How much light should spread/diffuse from
|
|
// refracting through the CRT glass?
|
|
static const float diffusion_weight_static = 0.075; // range [0, 1]
|
|
// Underestimate brightness: Bright areas bloom more, but we can base the
|
|
// bloom brightpass on a lower brightness to sharpen phosphors, or a higher
|
|
// brightness to soften them. Low values clip, but >= 0.8 looks okay.
|
|
static const float bloom_underestimate_levels_static = 0.8; // range [0, 5]
|
|
// Blur all colors more than necessary for a softer phosphor bloom?
|
|
static const float bloom_excess_static = 0.0; // range [0, 1]
|
|
// The BLOOM_APPROX pass approximates a phosphor blur early on with a small
|
|
// blurred resize of the input (convergence offsets are applied as well).
|
|
// There are three filter options (static option only for now):
|
|
// 0.) Bilinear resize: A fast, close approximation to a 4x4 resize
|
|
// if min_allowed_viewport_triads and the BLOOM_APPROX resolution are sane
|
|
// and beam_max_sigma is low.
|
|
// 1.) 3x3 resize blur: Medium speed, soft/smeared from bilinear blurring,
|
|
// always uses a static sigma regardless of beam_max_sigma or
|
|
// mask_num_triads_desired.
|
|
// 2.) True 4x4 Gaussian resize: Slowest, technically correct.
|
|
// These options are more pronounced for the fast, unbloomed shader version.
|
|
#ifndef RADEON_FIX
|
|
static const float bloom_approx_filter_static = 2.0;
|
|
#else
|
|
static const float bloom_approx_filter_static = 1.0;
|
|
#endif
|
|
|
|
// ELECTRON BEAM SCANLINE DISTRIBUTION:
|
|
// How many scanlines should contribute light to each pixel? Using more
|
|
// scanlines is slower (especially for a generalized Gaussian) but less
|
|
// distorted with larger beam sigmas (especially for a pure Gaussian). The
|
|
// max_beam_sigma at which the closest unused weight is guaranteed <
|
|
// 1.0/255.0 (for a 3x antialiased pure Gaussian) is:
|
|
// 2 scanlines: max_beam_sigma = 0.2089; distortions begin ~0.34; 141.7 FPS pure, 131.9 FPS generalized
|
|
// 3 scanlines, max_beam_sigma = 0.3879; distortions begin ~0.52; 137.5 FPS pure; 123.8 FPS generalized
|
|
// 4 scanlines, max_beam_sigma = 0.5723; distortions begin ~0.70; 134.7 FPS pure; 117.2 FPS generalized
|
|
// 5 scanlines, max_beam_sigma = 0.7591; distortions begin ~0.89; 131.6 FPS pure; 112.1 FPS generalized
|
|
// 6 scanlines, max_beam_sigma = 0.9483; distortions begin ~1.08; 127.9 FPS pure; 105.6 FPS generalized
|
|
static const float beam_num_scanlines = 3.0; // range [2, 6]
|
|
// A generalized Gaussian beam varies shape with color too, now just width.
|
|
// It's slower but more flexible (static option only for now).
|
|
static const bool beam_generalized_gaussian = true;
|
|
// What kind of scanline antialiasing do you want?
|
|
// 0: Sample weights at 1x; 1: Sample weights at 3x; 2: Compute an integral
|
|
// Integrals are slow (especially for generalized Gaussians) and rarely any
|
|
// better than 3x antialiasing (static option only for now).
|
|
static const float beam_antialias_level = 1.0; // range [0, 2]
|
|
// Min/max standard deviations for scanline beams: Higher values widen and
|
|
// soften scanlines. Depending on other options, low min sigmas can alias.
|
|
static const float beam_min_sigma_static = 0.02; // range (0, 1]
|
|
static const float beam_max_sigma_static = 0.3; // range (0, 1]
|
|
// Beam width varies as a function of color: A power function (0) is more
|
|
// configurable, but a spherical function (1) gives the widest beam
|
|
// variability without aliasing (static option only for now).
|
|
static const float beam_spot_shape_function = 0.0;
|
|
// Spot shape power: Powers <= 1 give smoother spot shapes but lower
|
|
// sharpness. Powers >= 1.0 are awful unless mix/max sigmas are close.
|
|
static const float beam_spot_power_static = 1.0/3.0; // range (0, 16]
|
|
// Generalized Gaussian max shape parameters: Higher values give flatter
|
|
// scanline plateaus and steeper dropoffs, simultaneously widening and
|
|
// sharpening scanlines at the cost of aliasing. 2.0 is pure Gaussian, and
|
|
// values > ~40.0 cause artifacts with integrals.
|
|
static const float beam_min_shape_static = 2.0; // range [2, 32]
|
|
static const float beam_max_shape_static = 4.0; // range [2, 32]
|
|
// Generalized Gaussian shape power: Affects how quickly the distribution
|
|
// changes shape from Gaussian to steep/plateaued as color increases from 0
|
|
// to 1.0. Higher powers appear softer for most colors, and lower powers
|
|
// appear sharper for most colors.
|
|
static const float beam_shape_power_static = 1.0/4.0; // range (0, 16]
|
|
// What filter should be used to sample scanlines horizontally?
|
|
// 0: Quilez (fast), 1: Gaussian (configurable), 2: Lanczos2 (sharp)
|
|
static const float beam_horiz_filter_static = 0.0;
|
|
// Standard deviation for horizontal Gaussian resampling:
|
|
static const float beam_horiz_sigma_static = 0.35; // range (0, 2/3]
|
|
// Do horizontal scanline sampling in linear RGB (correct light mixing),
|
|
// gamma-encoded RGB (darker, hard spot shape, may better match bandwidth-
|
|
// limiting circuitry in some CRT's), or a weighted avg.?
|
|
static const float beam_horiz_linear_rgb_weight_static = 1.0; // range [0, 1]
|
|
// Simulate scanline misconvergence? This needs 3x horizontal texture
|
|
// samples and 3x texture samples of BLOOM_APPROX and HALATION_BLUR in
|
|
// later passes (static option only for now).
|
|
static const bool beam_misconvergence = true;
|
|
// Convergence offsets in x/y directions for R/G/B scanline beams in units
|
|
// of scanlines. Positive offsets go right/down; ranges [-2, 2]
|
|
static const float2 convergence_offsets_r_static = float2(0.1, 0.2);
|
|
static const float2 convergence_offsets_g_static = float2(0.3, 0.4);
|
|
static const float2 convergence_offsets_b_static = float2(0.5, 0.6);
|
|
// Detect interlacing (static option only for now)?
|
|
static const bool interlace_detect = true;
|
|
// Assume 1080-line sources are interlaced?
|
|
static const bool interlace_1080i_static = false;
|
|
// For interlaced sources, assume TFF (top-field first) or BFF order?
|
|
// (Whether this matters depends on the nature of the interlaced input.)
|
|
static const bool interlace_bff_static = false;
|
|
|
|
// ANTIALIASING:
|
|
// What AA level do you want for curvature/overscan/subpixels? Options:
|
|
// 0x (none), 1x (sample subpixels), 4x, 5x, 6x, 7x, 8x, 12x, 16x, 20x, 24x
|
|
// (Static option only for now)
|
|
static const float aa_level = 12.0; // range [0, 24]
|
|
// What antialiasing filter do you want (static option only)? Options:
|
|
// 0: Box (separable), 1: Box (cylindrical),
|
|
// 2: Tent (separable), 3: Tent (cylindrical),
|
|
// 4: Gaussian (separable), 5: Gaussian (cylindrical),
|
|
// 6: Cubic* (separable), 7: Cubic* (cylindrical, poor)
|
|
// 8: Lanczos Sinc (separable), 9: Lanczos Jinc (cylindrical, poor)
|
|
// * = Especially slow with RUNTIME_ANTIALIAS_WEIGHTS
|
|
static const float aa_filter = 6.0; // range [0, 9]
|
|
// Flip the sample grid on odd/even frames (static option only for now)?
|
|
static const bool aa_temporal = false;
|
|
// Use RGB subpixel offsets for antialiasing? The pixel is at green, and
|
|
// the blue offset is the negative r offset; range [0, 0.5]
|
|
static const float2 aa_subpixel_r_offset_static = float2(-1.0/3.0, 0.0);//float2(0.0);
|
|
// Cubics: See http://www.imagemagick.org/Usage/filter/#mitchell
|
|
// 1.) "Keys cubics" with B = 1 - 2C are considered the highest quality.
|
|
// 2.) C = 0.5 (default) is Catmull-Rom; higher C's apply sharpening.
|
|
// 3.) C = 1.0/3.0 is the Mitchell-Netravali filter.
|
|
// 4.) C = 0.0 is a soft spline filter.
|
|
static const float aa_cubic_c_static = 0.5; // range [0, 4]
|
|
// Standard deviation for Gaussian antialiasing: Try 0.5/aa_pixel_diameter.
|
|
static const float aa_gauss_sigma_static = 0.5; // range [0.0625, 1.0]
|
|
|
|
// PHOSPHOR MASK:
|
|
// Mask type: 0 = aperture grille, 1 = slot mask, 2 = EDP shadow mask
|
|
static const float mask_type_static = 1.0; // range [0, 2]
|
|
// We can sample the mask three ways. Pick 2/3 from: Pretty/Fast/Flexible.
|
|
// 0.) Sinc-resize to the desired dot pitch manually (pretty/slow/flexible).
|
|
// This requires PHOSPHOR_MASK_MANUALLY_RESIZE to be #defined.
|
|
// 1.) Hardware-resize to the desired dot pitch (ugly/fast/flexible). This
|
|
// is halfway decent with LUT mipmapping but atrocious without it.
|
|
// 2.) Tile it without resizing at a 1:1 texel:pixel ratio for flat coords
|
|
// (pretty/fast/inflexible). Each input LUT has a fixed dot pitch.
|
|
// This mode reuses the same masks, so triads will be enormous unless
|
|
// you change the mask LUT filenames in your .cgp file.
|
|
static const float mask_sample_mode_static = 0.0; // range [0, 2]
|
|
// Prefer setting the triad size (0.0) or number on the screen (1.0)?
|
|
// If RUNTIME_PHOSPHOR_BLOOM_SIGMA isn't #defined, the specified triad size
|
|
// will always be used to calculate the full bloom sigma statically.
|
|
static const float mask_specify_num_triads_static = 0.0; // range [0, 1]
|
|
// Specify the phosphor triad size, in pixels. Each tile (usually with 8
|
|
// triads) will be rounded to the nearest integer tile size and clamped to
|
|
// obey minimum size constraints (imposed to reduce downsize taps) and
|
|
// maximum size constraints (imposed to have a sane MASK_RESIZE FBO size).
|
|
// To increase the size limit, double the viewport-relative scales for the
|
|
// two MASK_RESIZE passes in crt-royale.cgp and user-cgp-contants.h.
|
|
// range [1, mask_texture_small_size/mask_triads_per_tile]
|
|
static const float mask_triad_size_desired_static = 24.0 / 8.0;
|
|
// If mask_specify_num_triads is 1.0/true, we'll go by this instead (the
|
|
// final size will be rounded and constrained as above); default 480.0
|
|
static const float mask_num_triads_desired_static = 480.0;
|
|
// How many lobes should the sinc/Lanczos resizer use? More lobes require
|
|
// more samples and avoid moire a bit better, but some is unavoidable
|
|
// depending on the destination size (static option for now).
|
|
static const float mask_sinc_lobes = 3.0; // range [2, 4]
|
|
// The mask is resized using a variable number of taps in each dimension,
|
|
// but some Cg profiles always fetch a constant number of taps no matter
|
|
// what (no dynamic branching). We can limit the maximum number of taps if
|
|
// we statically limit the minimum phosphor triad size. Larger values are
|
|
// faster, but the limit IS enforced (static option only, forever);
|
|
// range [1, mask_texture_small_size/mask_triads_per_tile]
|
|
// TODO: Make this 1.0 and compensate with smarter sampling!
|
|
static const float mask_min_allowed_triad_size = 2.0;
|
|
|
|
// GEOMETRY:
|
|
// Geometry mode:
|
|
// 0: Off (default), 1: Spherical mapping (like cgwg's),
|
|
// 2: Alt. spherical mapping (more bulbous), 3: Cylindrical/Trinitron
|
|
static const float geom_mode_static = 0.0; // range [0, 3]
|
|
// Radius of curvature: Measured in units of your viewport's diagonal size.
|
|
static const float geom_radius_static = 2.0; // range [1/(2*pi), 1024]
|
|
// View dist is the distance from the player to their physical screen, in
|
|
// units of the viewport's diagonal size. It controls the field of view.
|
|
static const float geom_view_dist_static = 2.0; // range [0.5, 1024]
|
|
// Tilt angle in radians (clockwise around up and right vectors):
|
|
static const float2 geom_tilt_angle_static = float2(0.0, 0.0); // range [-pi, pi]
|
|
// Aspect ratio: When the true viewport size is unknown, this value is used
|
|
// to help convert between the phosphor triad size and count, along with
|
|
// the mask_resize_viewport_scale constant from user-cgp-constants.h. Set
|
|
// this equal to Retroarch's display aspect ratio (DAR) for best results;
|
|
// range [1, geom_max_aspect_ratio from user-cgp-constants.h];
|
|
// default (256/224)*(54/47) = 1.313069909 (see below)
|
|
static const float geom_aspect_ratio_static = 1.313069909;
|
|
// Before getting into overscan, here's some general aspect ratio info:
|
|
// - DAR = display aspect ratio = SAR * PAR; as in your Retroarch setting
|
|
// - SAR = storage aspect ratio = DAR / PAR; square pixel emulator frame AR
|
|
// - PAR = pixel aspect ratio = DAR / SAR; holds regardless of cropping
|
|
// Geometry processing has to "undo" the screen-space 2D DAR to calculate
|
|
// 3D view vectors, then reapplies the aspect ratio to the simulated CRT in
|
|
// uv-space. To ensure the source SAR is intended for a ~4:3 DAR, either:
|
|
// a.) Enable Retroarch's "Crop Overscan"
|
|
// b.) Readd horizontal padding: Set overscan to e.g. N*(1.0, 240.0/224.0)
|
|
// Real consoles use horizontal black padding in the signal, but emulators
|
|
// often crop this without cropping the vertical padding; a 256x224 [S]NES
|
|
// frame (8:7 SAR) is intended for a ~4:3 DAR, but a 256x240 frame is not.
|
|
// The correct [S]NES PAR is 54:47, found by blargg and NewRisingSun:
|
|
// http://board.zsnes.com/phpBB3/viewtopic.php?f=22&t=11928&start=50
|
|
// http://forums.nesdev.com/viewtopic.php?p=24815#p24815
|
|
// For flat output, it's okay to set DAR = [existing] SAR * [correct] PAR
|
|
// without doing a. or b., but horizontal image borders will be tighter
|
|
// than vertical ones, messing up curvature and overscan. Fixing the
|
|
// padding first corrects this.
|
|
// Overscan: Amount to "zoom in" before cropping. You can zoom uniformly
|
|
// or adjust x/y independently to e.g. readd horizontal padding, as noted
|
|
// above: Values < 1.0 zoom out; range (0, inf)
|
|
static const float2 geom_overscan_static = float2(1.0, 1.0);// * 1.005 * (1.0, 240/224.0)
|
|
// Compute a proper pixel-space to texture-space matrix even without ddx()/
|
|
// ddy()? This is ~8.5% slower but improves antialiasing/subpixel filtering
|
|
// with strong curvature (static option only for now).
|
|
static const bool geom_force_correct_tangent_matrix = true;
|
|
|
|
// BORDERS:
|
|
// Rounded border size in texture uv coords:
|
|
static const float border_size_static = 0.015; // range [0, 0.5]
|
|
// Border darkness: Moderate values darken the border smoothly, and high
|
|
// values make the image very dark just inside the border:
|
|
static const float border_darkness_static = 2.0; // range [0, inf)
|
|
// Border compression: High numbers compress border transitions, narrowing
|
|
// the dark border area.
|
|
static const float border_compress_static = 2.5; // range [1, inf)
|
|
|
|
|
|
#endif // USER_SETTINGS_H
|
|
|
|
///////////////////////////// END USER-SETTINGS ////////////////////////////
|
|
|
|
//#include "user-cgp-constants.h"
|
|
|
|
///////////////////////// BEGIN USER-CGP-CONSTANTS /////////////////////////
|
|
|
|
#ifndef USER_CGP_CONSTANTS_H
|
|
#define USER_CGP_CONSTANTS_H
|
|
|
|
// IMPORTANT:
|
|
// These constants MUST be set appropriately for the settings in crt-royale.cgp
|
|
// (or whatever related .cgp file you're using). If they aren't, you're likely
|
|
// to get artifacts, the wrong phosphor mask size, etc. I wish these could be
|
|
// set directly in the .cgp file to make things easier, but...they can't.
|
|
|
|
// PASS SCALES AND RELATED CONSTANTS:
|
|
// Copy the absolute scale_x for BLOOM_APPROX. There are two major versions of
|
|
// this shader: One does a viewport-scale bloom, and the other skips it. The
|
|
// latter benefits from a higher bloom_approx_scale_x, so save both separately:
|
|
static const float bloom_approx_size_x = 320.0;
|
|
static const float bloom_approx_size_x_for_fake = 400.0;
|
|
// Copy the viewport-relative scales of the phosphor mask resize passes
|
|
// (MASK_RESIZE and the pass immediately preceding it):
|
|
static const float2 mask_resize_viewport_scale = float2(0.0625, 0.0625);
|
|
// Copy the geom_max_aspect_ratio used to calculate the MASK_RESIZE scales, etc.:
|
|
static const float geom_max_aspect_ratio = 4.0/3.0;
|
|
|
|
// PHOSPHOR MASK TEXTURE CONSTANTS:
|
|
// Set the following constants to reflect the properties of the phosphor mask
|
|
// texture named in crt-royale.cgp. The shader optionally resizes a mask tile
|
|
// based on user settings, then repeats a single tile until filling the screen.
|
|
// The shader must know the input texture size (default 64x64), and to manually
|
|
// resize, it must also know the horizontal triads per tile (default 8).
|
|
static const float2 mask_texture_small_size = float2(64.0, 64.0);
|
|
static const float2 mask_texture_large_size = float2(512.0, 512.0);
|
|
static const float mask_triads_per_tile = 8.0;
|
|
// We need the average brightness of the phosphor mask to compensate for the
|
|
// dimming it causes. The following four values are roughly correct for the
|
|
// masks included with the shader. Update the value for any LUT texture you
|
|
// change. [Un]comment "#define PHOSPHOR_MASK_GRILLE14" depending on whether
|
|
// the loaded aperture grille uses 14-pixel or 15-pixel stripes (default 15).
|
|
//#define PHOSPHOR_MASK_GRILLE14
|
|
static const float mask_grille14_avg_color = 50.6666666/255.0;
|
|
// TileableLinearApertureGrille14Wide7d33Spacing*.png
|
|
// TileableLinearApertureGrille14Wide10And6Spacing*.png
|
|
static const float mask_grille15_avg_color = 53.0/255.0;
|
|
// TileableLinearApertureGrille15Wide6d33Spacing*.png
|
|
// TileableLinearApertureGrille15Wide8And5d5Spacing*.png
|
|
static const float mask_slot_avg_color = 46.0/255.0;
|
|
// TileableLinearSlotMask15Wide9And4d5Horizontal8VerticalSpacing*.png
|
|
// TileableLinearSlotMaskTall15Wide9And4d5Horizontal9d14VerticalSpacing*.png
|
|
static const float mask_shadow_avg_color = 41.0/255.0;
|
|
// TileableLinearShadowMask*.png
|
|
// TileableLinearShadowMaskEDP*.png
|
|
|
|
#ifdef PHOSPHOR_MASK_GRILLE14
|
|
static const float mask_grille_avg_color = mask_grille14_avg_color;
|
|
#else
|
|
static const float mask_grille_avg_color = mask_grille15_avg_color;
|
|
#endif
|
|
|
|
|
|
#endif // USER_CGP_CONSTANTS_H
|
|
|
|
////////////////////////// END USER-CGP-CONSTANTS //////////////////////////
|
|
|
|
//////////////////////////////// END INCLUDES ////////////////////////////////
|
|
|
|
/////////////////////////////// FIXED SETTINGS ///////////////////////////////
|
|
|
|
// Avoid dividing by zero; using a macro overloads for float, float2, etc.:
|
|
#define FIX_ZERO(c) (max(abs(c), 0.0000152587890625)) // 2^-16
|
|
|
|
// Ensure the first pass decodes CRT gamma and the last encodes LCD gamma.
|
|
#ifndef SIMULATE_CRT_ON_LCD
|
|
#define SIMULATE_CRT_ON_LCD
|
|
#endif
|
|
|
|
// Manually tiling a manually resized texture creates texture coord derivative
|
|
// discontinuities and confuses anisotropic filtering, causing discolored tile
|
|
// seams in the phosphor mask. Workarounds:
|
|
// a.) Using tex2Dlod disables anisotropic filtering for tiled masks. It's
|
|
// downgraded to tex2Dbias without DRIVERS_ALLOW_TEX2DLOD #defined and
|
|
// disabled without DRIVERS_ALLOW_TEX2DBIAS #defined either.
|
|
// b.) "Tile flat twice" requires drawing two full tiles without border padding
|
|
// to the resized mask FBO, and it's incompatible with same-pass curvature.
|
|
// (Same-pass curvature isn't used but could be in the future...maybe.)
|
|
// c.) "Fix discontinuities" requires derivatives and drawing one tile with
|
|
// border padding to the resized mask FBO, but it works with same-pass
|
|
// curvature. It's disabled without DRIVERS_ALLOW_DERIVATIVES #defined.
|
|
// Precedence: a, then, b, then c (if multiple strategies are #defined).
|
|
#define ANISOTROPIC_TILING_COMPAT_TEX2DLOD // 129.7 FPS, 4x, flat; 101.8 at fullscreen
|
|
#define ANISOTROPIC_TILING_COMPAT_TILE_FLAT_TWICE // 128.1 FPS, 4x, flat; 101.5 at fullscreen
|
|
#define ANISOTROPIC_TILING_COMPAT_FIX_DISCONTINUITIES // 124.4 FPS, 4x, flat; 97.4 at fullscreen
|
|
// Also, manually resampling the phosphor mask is slightly blurrier with
|
|
// anisotropic filtering. (Resampling with mipmapping is even worse: It
|
|
// creates artifacts, but only with the fully bloomed shader.) The difference
|
|
// is subtle with small triads, but you can fix it for a small cost.
|
|
//#define ANISOTROPIC_RESAMPLING_COMPAT_TEX2DLOD
|
|
|
|
|
|
////////////////////////////// DERIVED SETTINGS //////////////////////////////
|
|
|
|
// Intel HD 4000 GPU's can't handle manual mask resizing (for now), setting the
|
|
// geometry mode at runtime, or a 4x4 true Gaussian resize. Disable
|
|
// incompatible settings ASAP. (INTEGRATED_GRAPHICS_COMPATIBILITY_MODE may be
|
|
// #defined by either user-settings.h or a wrapper .cg that #includes the
|
|
// current .cg pass.)
|
|
#ifdef INTEGRATED_GRAPHICS_COMPATIBILITY_MODE
|
|
#ifdef PHOSPHOR_MASK_MANUALLY_RESIZE
|
|
#undef PHOSPHOR_MASK_MANUALLY_RESIZE
|
|
#endif
|
|
#ifdef RUNTIME_GEOMETRY_MODE
|
|
#undef RUNTIME_GEOMETRY_MODE
|
|
#endif
|
|
// Mode 2 (4x4 Gaussian resize) won't work, and mode 1 (3x3 blur) is
|
|
// inferior in most cases, so replace 2.0 with 0.0:
|
|
static const float bloom_approx_filter =
|
|
bloom_approx_filter_static > 1.5 ? 0.0 : bloom_approx_filter_static;
|
|
#else
|
|
static const float bloom_approx_filter = bloom_approx_filter_static;
|
|
#endif
|
|
|
|
// Disable slow runtime paths if static parameters are used. Most of these
|
|
// won't be a problem anyway once the params are disabled, but some will.
|
|
#ifndef RUNTIME_SHADER_PARAMS_ENABLE
|
|
#ifdef RUNTIME_PHOSPHOR_BLOOM_SIGMA
|
|
#undef RUNTIME_PHOSPHOR_BLOOM_SIGMA
|
|
#endif
|
|
#ifdef RUNTIME_ANTIALIAS_WEIGHTS
|
|
#undef RUNTIME_ANTIALIAS_WEIGHTS
|
|
#endif
|
|
#ifdef RUNTIME_ANTIALIAS_SUBPIXEL_OFFSETS
|
|
#undef RUNTIME_ANTIALIAS_SUBPIXEL_OFFSETS
|
|
#endif
|
|
#ifdef RUNTIME_SCANLINES_HORIZ_FILTER_COLORSPACE
|
|
#undef RUNTIME_SCANLINES_HORIZ_FILTER_COLORSPACE
|
|
#endif
|
|
#ifdef RUNTIME_GEOMETRY_TILT
|
|
#undef RUNTIME_GEOMETRY_TILT
|
|
#endif
|
|
#ifdef RUNTIME_GEOMETRY_MODE
|
|
#undef RUNTIME_GEOMETRY_MODE
|
|
#endif
|
|
#ifdef FORCE_RUNTIME_PHOSPHOR_MASK_MODE_TYPE_SELECT
|
|
#undef FORCE_RUNTIME_PHOSPHOR_MASK_MODE_TYPE_SELECT
|
|
#endif
|
|
#endif
|
|
|
|
// Make tex2Dbias a backup for tex2Dlod for wider compatibility.
|
|
#ifdef ANISOTROPIC_TILING_COMPAT_TEX2DLOD
|
|
#define ANISOTROPIC_TILING_COMPAT_TEX2DBIAS
|
|
#endif
|
|
#ifdef ANISOTROPIC_RESAMPLING_COMPAT_TEX2DLOD
|
|
#define ANISOTROPIC_RESAMPLING_COMPAT_TEX2DBIAS
|
|
#endif
|
|
// Rule out unavailable anisotropic compatibility strategies:
|
|
#ifndef DRIVERS_ALLOW_DERIVATIVES
|
|
#ifdef ANISOTROPIC_TILING_COMPAT_FIX_DISCONTINUITIES
|
|
#undef ANISOTROPIC_TILING_COMPAT_FIX_DISCONTINUITIES
|
|
#endif
|
|
#endif
|
|
#ifndef DRIVERS_ALLOW_TEX2DLOD
|
|
#ifdef ANISOTROPIC_TILING_COMPAT_TEX2DLOD
|
|
#undef ANISOTROPIC_TILING_COMPAT_TEX2DLOD
|
|
#endif
|
|
#ifdef ANISOTROPIC_RESAMPLING_COMPAT_TEX2DLOD
|
|
#undef ANISOTROPIC_RESAMPLING_COMPAT_TEX2DLOD
|
|
#endif
|
|
#ifdef ANTIALIAS_DISABLE_ANISOTROPIC
|
|
#undef ANTIALIAS_DISABLE_ANISOTROPIC
|
|
#endif
|
|
#endif
|
|
#ifndef DRIVERS_ALLOW_TEX2DBIAS
|
|
#ifdef ANISOTROPIC_TILING_COMPAT_TEX2DBIAS
|
|
#undef ANISOTROPIC_TILING_COMPAT_TEX2DBIAS
|
|
#endif
|
|
#ifdef ANISOTROPIC_RESAMPLING_COMPAT_TEX2DBIAS
|
|
#undef ANISOTROPIC_RESAMPLING_COMPAT_TEX2DBIAS
|
|
#endif
|
|
#endif
|
|
// Prioritize anisotropic tiling compatibility strategies by performance and
|
|
// disable unused strategies. This concentrates all the nesting in one place.
|
|
#ifdef ANISOTROPIC_TILING_COMPAT_TEX2DLOD
|
|
#ifdef ANISOTROPIC_TILING_COMPAT_TEX2DBIAS
|
|
#undef ANISOTROPIC_TILING_COMPAT_TEX2DBIAS
|
|
#endif
|
|
#ifdef ANISOTROPIC_TILING_COMPAT_TILE_FLAT_TWICE
|
|
#undef ANISOTROPIC_TILING_COMPAT_TILE_FLAT_TWICE
|
|
#endif
|
|
#ifdef ANISOTROPIC_TILING_COMPAT_FIX_DISCONTINUITIES
|
|
#undef ANISOTROPIC_TILING_COMPAT_FIX_DISCONTINUITIES
|
|
#endif
|
|
#else
|
|
#ifdef ANISOTROPIC_TILING_COMPAT_TEX2DBIAS
|
|
#ifdef ANISOTROPIC_TILING_COMPAT_TILE_FLAT_TWICE
|
|
#undef ANISOTROPIC_TILING_COMPAT_TILE_FLAT_TWICE
|
|
#endif
|
|
#ifdef ANISOTROPIC_TILING_COMPAT_FIX_DISCONTINUITIES
|
|
#undef ANISOTROPIC_TILING_COMPAT_FIX_DISCONTINUITIES
|
|
#endif
|
|
#else
|
|
// ANISOTROPIC_TILING_COMPAT_TILE_FLAT_TWICE is only compatible with
|
|
// flat texture coords in the same pass, but that's all we use.
|
|
#ifdef ANISOTROPIC_TILING_COMPAT_TILE_FLAT_TWICE
|
|
#ifdef ANISOTROPIC_TILING_COMPAT_FIX_DISCONTINUITIES
|
|
#undef ANISOTROPIC_TILING_COMPAT_FIX_DISCONTINUITIES
|
|
#endif
|
|
#endif
|
|
#endif
|
|
#endif
|
|
// The tex2Dlod and tex2Dbias strategies share a lot in common, and we can
|
|
// reduce some #ifdef nesting in the next section by essentially OR'ing them:
|
|
#ifdef ANISOTROPIC_TILING_COMPAT_TEX2DLOD
|
|
#define ANISOTROPIC_TILING_COMPAT_TEX2DLOD_FAMILY
|
|
#endif
|
|
#ifdef ANISOTROPIC_TILING_COMPAT_TEX2DBIAS
|
|
#define ANISOTROPIC_TILING_COMPAT_TEX2DLOD_FAMILY
|
|
#endif
|
|
// Prioritize anisotropic resampling compatibility strategies the same way:
|
|
#ifdef ANISOTROPIC_RESAMPLING_COMPAT_TEX2DLOD
|
|
#ifdef ANISOTROPIC_RESAMPLING_COMPAT_TEX2DBIAS
|
|
#undef ANISOTROPIC_RESAMPLING_COMPAT_TEX2DBIAS
|
|
#endif
|
|
#endif
|
|
|
|
|
|
/////////////////////// DERIVED PHOSPHOR MASK CONSTANTS //////////////////////
|
|
|
|
// If we can use the large mipmapped LUT without mipmapping artifacts, we
|
|
// should: It gives us more options for using fewer samples.
|
|
#ifdef DRIVERS_ALLOW_TEX2DLOD
|
|
#ifdef ANISOTROPIC_RESAMPLING_COMPAT_TEX2DLOD
|
|
// TODO: Take advantage of this!
|
|
#define PHOSPHOR_MASK_RESIZE_MIPMAPPED_LUT
|
|
static const float2 mask_resize_src_lut_size = mask_texture_large_size;
|
|
#else
|
|
static const float2 mask_resize_src_lut_size = mask_texture_small_size;
|
|
#endif
|
|
#else
|
|
static const float2 mask_resize_src_lut_size = mask_texture_small_size;
|
|
#endif
|
|
|
|
|
|
// tex2D's sampler2D parameter MUST be a uniform global, a uniform input to
|
|
// main_fragment, or a static alias of one of the above. This makes it hard
|
|
// to select the phosphor mask at runtime: We can't even assign to a uniform
|
|
// global in the vertex shader or select a sampler2D in the vertex shader and
|
|
// pass it to the fragment shader (even with explicit TEXUNIT# bindings),
|
|
// because it just gives us the input texture or a black screen. However, we
|
|
// can get around these limitations by calling tex2D three times with different
|
|
// uniform samplers (or resizing the phosphor mask three times altogether).
|
|
// With dynamic branches, we can process only one of these branches on top of
|
|
// quickly discarding fragments we don't need (cgc seems able to overcome
|
|
// limigations around dependent texture fetches inside of branches). Without
|
|
// dynamic branches, we have to process every branch for every fragment...which
|
|
// is slower. Runtime sampling mode selection is slower without dynamic
|
|
// branches as well. Let the user's static #defines decide if it's worth it.
|
|
#ifdef DRIVERS_ALLOW_DYNAMIC_BRANCHES
|
|
#define RUNTIME_PHOSPHOR_MASK_MODE_TYPE_SELECT
|
|
#else
|
|
#ifdef FORCE_RUNTIME_PHOSPHOR_MASK_MODE_TYPE_SELECT
|
|
#define RUNTIME_PHOSPHOR_MASK_MODE_TYPE_SELECT
|
|
#endif
|
|
#endif
|
|
|
|
// We need to render some minimum number of tiles in the resize passes.
|
|
// We need at least 1.0 just to repeat a single tile, and we need extra
|
|
// padding beyond that for anisotropic filtering, discontinuitity fixing,
|
|
// antialiasing, same-pass curvature (not currently used), etc. First
|
|
// determine how many border texels and tiles we need, based on how the result
|
|
// will be sampled:
|
|
#ifdef GEOMETRY_EARLY
|
|
static const float max_subpixel_offset = aa_subpixel_r_offset_static.x;
|
|
// Most antialiasing filters have a base radius of 4.0 pixels:
|
|
static const float max_aa_base_pixel_border = 4.0 +
|
|
max_subpixel_offset;
|
|
#else
|
|
static const float max_aa_base_pixel_border = 0.0;
|
|
#endif
|
|
// Anisotropic filtering adds about 0.5 to the pixel border:
|
|
#ifndef ANISOTROPIC_TILING_COMPAT_TEX2DLOD_FAMILY
|
|
static const float max_aniso_pixel_border = max_aa_base_pixel_border + 0.5;
|
|
#else
|
|
static const float max_aniso_pixel_border = max_aa_base_pixel_border;
|
|
#endif
|
|
// Fixing discontinuities adds 1.0 more to the pixel border:
|
|
#ifdef ANISOTROPIC_TILING_COMPAT_FIX_DISCONTINUITIES
|
|
static const float max_tiled_pixel_border = max_aniso_pixel_border + 1.0;
|
|
#else
|
|
static const float max_tiled_pixel_border = max_aniso_pixel_border;
|
|
#endif
|
|
// Convert the pixel border to an integer texel border. Assume same-pass
|
|
// curvature about triples the texel frequency:
|
|
#ifdef GEOMETRY_EARLY
|
|
static const float max_mask_texel_border =
|
|
ceil(max_tiled_pixel_border * 3.0);
|
|
#else
|
|
static const float max_mask_texel_border = ceil(max_tiled_pixel_border);
|
|
#endif
|
|
// Convert the texel border to a tile border using worst-case assumptions:
|
|
static const float max_mask_tile_border = max_mask_texel_border/
|
|
(mask_min_allowed_triad_size * mask_triads_per_tile);
|
|
|
|
// Finally, set the number of resized tiles to render to MASK_RESIZE, and set
|
|
// the starting texel (inside borders) for sampling it.
|
|
#ifndef GEOMETRY_EARLY
|
|
#ifdef ANISOTROPIC_TILING_COMPAT_TILE_FLAT_TWICE
|
|
// Special case: Render two tiles without borders. Anisotropic
|
|
// filtering doesn't seem to be a problem here.
|
|
static const float mask_resize_num_tiles = 1.0 + 1.0;
|
|
static const float mask_start_texels = 0.0;
|
|
#else
|
|
static const float mask_resize_num_tiles = 1.0 +
|
|
2.0 * max_mask_tile_border;
|
|
static const float mask_start_texels = max_mask_texel_border;
|
|
#endif
|
|
#else
|
|
static const float mask_resize_num_tiles = 1.0 + 2.0*max_mask_tile_border;
|
|
static const float mask_start_texels = max_mask_texel_border;
|
|
#endif
|
|
|
|
// We have to fit mask_resize_num_tiles into an FBO with a viewport scale of
|
|
// mask_resize_viewport_scale. This limits the maximum final triad size.
|
|
// Estimate the minimum number of triads we can split the screen into in each
|
|
// dimension (we'll be as correct as mask_resize_viewport_scale is):
|
|
static const float mask_resize_num_triads =
|
|
mask_resize_num_tiles * mask_triads_per_tile;
|
|
static const float2 min_allowed_viewport_triads =
|
|
float2(mask_resize_num_triads) / mask_resize_viewport_scale;
|
|
|
|
|
|
//////////////////////// COMMON MATHEMATICAL CONSTANTS ///////////////////////
|
|
|
|
static const float pi = 3.141592653589;
|
|
// We often want to find the location of the previous texel, e.g.:
|
|
// const float2 curr_texel = uv * texture_size;
|
|
// const float2 prev_texel = floor(curr_texel - float2(0.5)) + float2(0.5);
|
|
// const float2 prev_texel_uv = prev_texel / texture_size;
|
|
// However, many GPU drivers round incorrectly around exact texel locations.
|
|
// We need to subtract a little less than 0.5 before flooring, and some GPU's
|
|
// require this value to be farther from 0.5 than others; define it here.
|
|
// const float2 prev_texel =
|
|
// floor(curr_texel - float2(under_half)) + float2(0.5);
|
|
static const float under_half = 0.4995;
|
|
|
|
|
|
#endif // DERIVED_SETTINGS_AND_CONSTANTS_H
|
|
|
|
//////////////////// END DERIVED-SETTINGS-AND-CONSTANTS /////////////////////
|
|
|
|
//////////////////////////////// END INCLUDES ////////////////////////////////
|
|
|
|
// Override some parameters for gamma-management.h and tex2Dantialias.h:
|
|
#define OVERRIDE_DEVICE_GAMMA
|
|
static const float gba_gamma = 3.5; // Irrelevant but necessary to define.
|
|
#define ANTIALIAS_OVERRIDE_BASICS
|
|
#define ANTIALIAS_OVERRIDE_PARAMETERS
|
|
|
|
// Provide accessors for vector constants that pack scalar uniforms:
|
|
inline float2 get_aspect_vector(const float geom_aspect_ratio)
|
|
{
|
|
// Get an aspect ratio vector. Enforce geom_max_aspect_ratio, and prevent
|
|
// the absolute scale from affecting the uv-mapping for curvature:
|
|
const float geom_clamped_aspect_ratio =
|
|
min(geom_aspect_ratio, geom_max_aspect_ratio);
|
|
const float2 geom_aspect =
|
|
normalize(float2(geom_clamped_aspect_ratio, 1.0));
|
|
return geom_aspect;
|
|
}
|
|
|
|
inline float2 get_geom_overscan_vector()
|
|
{
|
|
return float2(geom_overscan_x, geom_overscan_y);
|
|
}
|
|
|
|
inline float2 get_geom_tilt_angle_vector()
|
|
{
|
|
return float2(geom_tilt_angle_x, geom_tilt_angle_y);
|
|
}
|
|
|
|
inline float3 get_convergence_offsets_x_vector()
|
|
{
|
|
return float3(convergence_offset_x_r, convergence_offset_x_g,
|
|
convergence_offset_x_b);
|
|
}
|
|
|
|
inline float3 get_convergence_offsets_y_vector()
|
|
{
|
|
return float3(convergence_offset_y_r, convergence_offset_y_g,
|
|
convergence_offset_y_b);
|
|
}
|
|
|
|
inline float2 get_convergence_offsets_r_vector()
|
|
{
|
|
return float2(convergence_offset_x_r, convergence_offset_y_r);
|
|
}
|
|
|
|
inline float2 get_convergence_offsets_g_vector()
|
|
{
|
|
return float2(convergence_offset_x_g, convergence_offset_y_g);
|
|
}
|
|
|
|
inline float2 get_convergence_offsets_b_vector()
|
|
{
|
|
return float2(convergence_offset_x_b, convergence_offset_y_b);
|
|
}
|
|
|
|
inline float2 get_aa_subpixel_r_offset()
|
|
{
|
|
#ifdef RUNTIME_ANTIALIAS_WEIGHTS
|
|
#ifdef RUNTIME_ANTIALIAS_SUBPIXEL_OFFSETS
|
|
// WARNING: THIS IS EXTREMELY EXPENSIVE.
|
|
return float2(aa_subpixel_r_offset_x_runtime,
|
|
aa_subpixel_r_offset_y_runtime);
|
|
#else
|
|
return aa_subpixel_r_offset_static;
|
|
#endif
|
|
#else
|
|
return aa_subpixel_r_offset_static;
|
|
#endif
|
|
}
|
|
|
|
// Provide accessors settings which still need "cooking:"
|
|
inline float get_mask_amplify()
|
|
{
|
|
static const float mask_grille_amplify = 1.0/mask_grille_avg_color;
|
|
static const float mask_slot_amplify = 1.0/mask_slot_avg_color;
|
|
static const float mask_shadow_amplify = 1.0/mask_shadow_avg_color;
|
|
return mask_type < 0.5 ? mask_grille_amplify :
|
|
mask_type < 1.5 ? mask_slot_amplify :
|
|
mask_shadow_amplify;
|
|
}
|
|
|
|
inline float get_mask_sample_mode()
|
|
{
|
|
#ifdef RUNTIME_PHOSPHOR_MASK_MODE_TYPE_SELECT
|
|
#ifdef PHOSPHOR_MASK_MANUALLY_RESIZE
|
|
return mask_sample_mode_desired;
|
|
#else
|
|
return clamp(mask_sample_mode_desired, 1.0, 2.0);
|
|
#endif
|
|
#else
|
|
#ifdef PHOSPHOR_MASK_MANUALLY_RESIZE
|
|
return mask_sample_mode_static;
|
|
#else
|
|
return clamp(mask_sample_mode_static, 1.0, 2.0);
|
|
#endif
|
|
#endif
|
|
}
|
|
|
|
#endif // BIND_SHADER_PARAMS_H
|
|
|
|
//////////////////////////// END BIND-SHADER-PARAMS ///////////////////////////
|
|
|
|
//#include "scanline-functions.h"
|
|
|
|
///////////////////////////// BEGIN SCANLINE-FUNCTIONS ////////////////////////////
|
|
|
|
#ifndef SCANLINE_FUNCTIONS_H
|
|
#define SCANLINE_FUNCTIONS_H
|
|
|
|
///////////////////////////// GPL LICENSE NOTICE /////////////////////////////
|
|
|
|
// crt-royale: A full-featured CRT shader, with cheese.
|
|
// Copyright (C) 2014 TroggleMonkey <trogglemonkey@gmx.com>
|
|
//
|
|
// This program is free software; you can redistribute it and/or modify it
|
|
// under the terms of the GNU General Public License as published by the Free
|
|
// Software Foundation; either version 2 of the License, or any later version.
|
|
//
|
|
// This program is distributed in the hope that it will be useful, but WITHOUT
|
|
// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
|
// more details.
|
|
//
|
|
// You should have received a copy of the GNU General Public License along with
|
|
// this program; if not, write to the Free Software Foundation, Inc., 59 Temple
|
|
// Place, Suite 330, Boston, MA 02111-1307 USA
|
|
|
|
|
|
/////////////////////////////// BEGIN INCLUDES ///////////////////////////////
|
|
|
|
//#include "../user-settings.h"
|
|
|
|
///////////////////////////// BEGIN USER-SETTINGS ////////////////////////////
|
|
|
|
#ifndef USER_SETTINGS_H
|
|
#define USER_SETTINGS_H
|
|
|
|
///////////////////////////// DRIVER CAPABILITIES ////////////////////////////
|
|
|
|
// The Cg compiler uses different "profiles" with different capabilities.
|
|
// This shader requires a Cg compilation profile >= arbfp1, but a few options
|
|
// require higher profiles like fp30 or fp40. The shader can't detect profile
|
|
// or driver capabilities, so instead you must comment or uncomment the lines
|
|
// below with "//" before "#define." Disable an option if you get compilation
|
|
// errors resembling those listed. Generally speaking, all of these options
|
|
// will run on nVidia cards, but only DRIVERS_ALLOW_TEX2DBIAS (if that) is
|
|
// likely to run on ATI/AMD, due to the Cg compiler's profile limitations.
|
|
|
|
// Derivatives: Unsupported on fp20, ps_1_1, ps_1_2, ps_1_3, and arbfp1.
|
|
// Among other things, derivatives help us fix anisotropic filtering artifacts
|
|
// with curved manually tiled phosphor mask coords. Related errors:
|
|
// error C3004: function "float2 ddx(float2);" not supported in this profile
|
|
// error C3004: function "float2 ddy(float2);" not supported in this profile
|
|
//#define DRIVERS_ALLOW_DERIVATIVES
|
|
|
|
// Fine derivatives: Unsupported on older ATI cards.
|
|
// Fine derivatives enable 2x2 fragment block communication, letting us perform
|
|
// fast single-pass blur operations. If your card uses coarse derivatives and
|
|
// these are enabled, blurs could look broken. Derivatives are a prerequisite.
|
|
#ifdef DRIVERS_ALLOW_DERIVATIVES
|
|
#define DRIVERS_ALLOW_FINE_DERIVATIVES
|
|
#endif
|
|
|
|
// Dynamic looping: Requires an fp30 or newer profile.
|
|
// This makes phosphor mask resampling faster in some cases. Related errors:
|
|
// error C5013: profile does not support "for" statements and "for" could not
|
|
// be unrolled
|
|
//#define DRIVERS_ALLOW_DYNAMIC_BRANCHES
|
|
|
|
// Without DRIVERS_ALLOW_DYNAMIC_BRANCHES, we need to use unrollable loops.
|
|
// Using one static loop avoids overhead if the user is right, but if the user
|
|
// is wrong (loops are allowed), breaking a loop into if-blocked pieces with a
|
|
// binary search can potentially save some iterations. However, it may fail:
|
|
// error C6001: Temporary register limit of 32 exceeded; 35 registers
|
|
// needed to compile program
|
|
//#define ACCOMODATE_POSSIBLE_DYNAMIC_LOOPS
|
|
|
|
// tex2Dlod: Requires an fp40 or newer profile. This can be used to disable
|
|
// anisotropic filtering, thereby fixing related artifacts. Related errors:
|
|
// error C3004: function "float4 tex2Dlod(sampler2D, float4);" not supported in
|
|
// this profile
|
|
//#define DRIVERS_ALLOW_TEX2DLOD
|
|
|
|
// tex2Dbias: Requires an fp30 or newer profile. This can be used to alleviate
|
|
// artifacts from anisotropic filtering and mipmapping. Related errors:
|
|
// error C3004: function "float4 tex2Dbias(sampler2D, float4);" not supported
|
|
// in this profile
|
|
//#define DRIVERS_ALLOW_TEX2DBIAS
|
|
|
|
// Integrated graphics compatibility: Integrated graphics like Intel HD 4000
|
|
// impose stricter limitations on register counts and instructions. Enable
|
|
// INTEGRATED_GRAPHICS_COMPATIBILITY_MODE if you still see error C6001 or:
|
|
// error C6002: Instruction limit of 1024 exceeded: 1523 instructions needed
|
|
// to compile program.
|
|
// Enabling integrated graphics compatibility mode will automatically disable:
|
|
// 1.) PHOSPHOR_MASK_MANUALLY_RESIZE: The phosphor mask will be softer.
|
|
// (This may be reenabled in a later release.)
|
|
// 2.) RUNTIME_GEOMETRY_MODE
|
|
// 3.) The high-quality 4x4 Gaussian resize for the bloom approximation
|
|
//#define INTEGRATED_GRAPHICS_COMPATIBILITY_MODE
|
|
|
|
|
|
//////////////////////////// USER CODEPATH OPTIONS ///////////////////////////
|
|
|
|
// To disable a #define option, turn its line into a comment with "//."
|
|
|
|
// RUNTIME VS. COMPILE-TIME OPTIONS (Major Performance Implications):
|
|
// Enable runtime shader parameters in the Retroarch (etc.) GUI? They override
|
|
// many of the options in this file and allow real-time tuning, but many of
|
|
// them are slower. Disabling them and using this text file will boost FPS.
|
|
#define RUNTIME_SHADER_PARAMS_ENABLE
|
|
// Specify the phosphor bloom sigma at runtime? This option is 10% slower, but
|
|
// it's the only way to do a wide-enough full bloom with a runtime dot pitch.
|
|
#define RUNTIME_PHOSPHOR_BLOOM_SIGMA
|
|
// Specify antialiasing weight parameters at runtime? (Costs ~20% with cubics)
|
|
#define RUNTIME_ANTIALIAS_WEIGHTS
|
|
// Specify subpixel offsets at runtime? (WARNING: EXTREMELY EXPENSIVE!)
|
|
//#define RUNTIME_ANTIALIAS_SUBPIXEL_OFFSETS
|
|
// Make beam_horiz_filter and beam_horiz_linear_rgb_weight into runtime shader
|
|
// parameters? This will require more math or dynamic branching.
|
|
#define RUNTIME_SCANLINES_HORIZ_FILTER_COLORSPACE
|
|
// Specify the tilt at runtime? This makes things about 3% slower.
|
|
#define RUNTIME_GEOMETRY_TILT
|
|
// Specify the geometry mode at runtime?
|
|
#define RUNTIME_GEOMETRY_MODE
|
|
// Specify the phosphor mask type (aperture grille, slot mask, shadow mask) and
|
|
// mode (Lanczos-resize, hardware resize, or tile 1:1) at runtime, even without
|
|
// dynamic branches? This is cheap if mask_resize_viewport_scale is small.
|
|
#define FORCE_RUNTIME_PHOSPHOR_MASK_MODE_TYPE_SELECT
|
|
|
|
// PHOSPHOR MASK:
|
|
// Manually resize the phosphor mask for best results (slower)? Disabling this
|
|
// removes the option to do so, but it may be faster without dynamic branches.
|
|
#define PHOSPHOR_MASK_MANUALLY_RESIZE
|
|
// If we sinc-resize the mask, should we Lanczos-window it (slower but better)?
|
|
#define PHOSPHOR_MASK_RESIZE_LANCZOS_WINDOW
|
|
// Larger blurs are expensive, but we need them to blur larger triads. We can
|
|
// detect the right blur if the triad size is static or our profile allows
|
|
// dynamic branches, but otherwise we use the largest blur the user indicates
|
|
// they might need:
|
|
#define PHOSPHOR_BLOOM_TRIADS_LARGER_THAN_3_PIXELS
|
|
//#define PHOSPHOR_BLOOM_TRIADS_LARGER_THAN_6_PIXELS
|
|
//#define PHOSPHOR_BLOOM_TRIADS_LARGER_THAN_9_PIXELS
|
|
//#define PHOSPHOR_BLOOM_TRIADS_LARGER_THAN_12_PIXELS
|
|
// Here's a helpful chart:
|
|
// MaxTriadSize BlurSize MinTriadCountsByResolution
|
|
// 3.0 9.0 480/640/960/1920 triads at 1080p/1440p/2160p/4320p, 4:3 aspect
|
|
// 6.0 17.0 240/320/480/960 triads at 1080p/1440p/2160p/4320p, 4:3 aspect
|
|
// 9.0 25.0 160/213/320/640 triads at 1080p/1440p/2160p/4320p, 4:3 aspect
|
|
// 12.0 31.0 120/160/240/480 triads at 1080p/1440p/2160p/4320p, 4:3 aspect
|
|
// 18.0 43.0 80/107/160/320 triads at 1080p/1440p/2160p/4320p, 4:3 aspect
|
|
|
|
|
|
/////////////////////////////// USER PARAMETERS //////////////////////////////
|
|
|
|
// Note: Many of these static parameters are overridden by runtime shader
|
|
// parameters when those are enabled. However, many others are static codepath
|
|
// options that were cleaner or more convert to code as static constants.
|
|
|
|
// GAMMA:
|
|
static const float crt_gamma_static = 2.5; // range [1, 5]
|
|
static const float lcd_gamma_static = 2.2; // range [1, 5]
|
|
|
|
// LEVELS MANAGEMENT:
|
|
// Control the final multiplicative image contrast:
|
|
static const float levels_contrast_static = 1.0; // range [0, 4)
|
|
// We auto-dim to avoid clipping between passes and restore brightness
|
|
// later. Control the dim factor here: Lower values clip less but crush
|
|
// blacks more (static only for now).
|
|
static const float levels_autodim_temp = 0.5; // range (0, 1] default is 0.5 but that was unnecessarily dark for me, so I set it to 1.0
|
|
|
|
// HALATION/DIFFUSION/BLOOM:
|
|
// Halation weight: How much energy should be lost to electrons bounding
|
|
// around under the CRT glass and exciting random phosphors?
|
|
static const float halation_weight_static = 0.0; // range [0, 1]
|
|
// Refractive diffusion weight: How much light should spread/diffuse from
|
|
// refracting through the CRT glass?
|
|
static const float diffusion_weight_static = 0.075; // range [0, 1]
|
|
// Underestimate brightness: Bright areas bloom more, but we can base the
|
|
// bloom brightpass on a lower brightness to sharpen phosphors, or a higher
|
|
// brightness to soften them. Low values clip, but >= 0.8 looks okay.
|
|
static const float bloom_underestimate_levels_static = 0.8; // range [0, 5]
|
|
// Blur all colors more than necessary for a softer phosphor bloom?
|
|
static const float bloom_excess_static = 0.0; // range [0, 1]
|
|
// The BLOOM_APPROX pass approximates a phosphor blur early on with a small
|
|
// blurred resize of the input (convergence offsets are applied as well).
|
|
// There are three filter options (static option only for now):
|
|
// 0.) Bilinear resize: A fast, close approximation to a 4x4 resize
|
|
// if min_allowed_viewport_triads and the BLOOM_APPROX resolution are sane
|
|
// and beam_max_sigma is low.
|
|
// 1.) 3x3 resize blur: Medium speed, soft/smeared from bilinear blurring,
|
|
// always uses a static sigma regardless of beam_max_sigma or
|
|
// mask_num_triads_desired.
|
|
// 2.) True 4x4 Gaussian resize: Slowest, technically correct.
|
|
// These options are more pronounced for the fast, unbloomed shader version.
|
|
#ifndef RADEON_FIX
|
|
static const float bloom_approx_filter_static = 2.0;
|
|
#else
|
|
static const float bloom_approx_filter_static = 1.0;
|
|
#endif
|
|
|
|
// ELECTRON BEAM SCANLINE DISTRIBUTION:
|
|
// How many scanlines should contribute light to each pixel? Using more
|
|
// scanlines is slower (especially for a generalized Gaussian) but less
|
|
// distorted with larger beam sigmas (especially for a pure Gaussian). The
|
|
// max_beam_sigma at which the closest unused weight is guaranteed <
|
|
// 1.0/255.0 (for a 3x antialiased pure Gaussian) is:
|
|
// 2 scanlines: max_beam_sigma = 0.2089; distortions begin ~0.34; 141.7 FPS pure, 131.9 FPS generalized
|
|
// 3 scanlines, max_beam_sigma = 0.3879; distortions begin ~0.52; 137.5 FPS pure; 123.8 FPS generalized
|
|
// 4 scanlines, max_beam_sigma = 0.5723; distortions begin ~0.70; 134.7 FPS pure; 117.2 FPS generalized
|
|
// 5 scanlines, max_beam_sigma = 0.7591; distortions begin ~0.89; 131.6 FPS pure; 112.1 FPS generalized
|
|
// 6 scanlines, max_beam_sigma = 0.9483; distortions begin ~1.08; 127.9 FPS pure; 105.6 FPS generalized
|
|
static const float beam_num_scanlines = 3.0; // range [2, 6]
|
|
// A generalized Gaussian beam varies shape with color too, now just width.
|
|
// It's slower but more flexible (static option only for now).
|
|
static const bool beam_generalized_gaussian = true;
|
|
// What kind of scanline antialiasing do you want?
|
|
// 0: Sample weights at 1x; 1: Sample weights at 3x; 2: Compute an integral
|
|
// Integrals are slow (especially for generalized Gaussians) and rarely any
|
|
// better than 3x antialiasing (static option only for now).
|
|
static const float beam_antialias_level = 1.0; // range [0, 2]
|
|
// Min/max standard deviations for scanline beams: Higher values widen and
|
|
// soften scanlines. Depending on other options, low min sigmas can alias.
|
|
static const float beam_min_sigma_static = 0.02; // range (0, 1]
|
|
static const float beam_max_sigma_static = 0.3; // range (0, 1]
|
|
// Beam width varies as a function of color: A power function (0) is more
|
|
// configurable, but a spherical function (1) gives the widest beam
|
|
// variability without aliasing (static option only for now).
|
|
static const float beam_spot_shape_function = 0.0;
|
|
// Spot shape power: Powers <= 1 give smoother spot shapes but lower
|
|
// sharpness. Powers >= 1.0 are awful unless mix/max sigmas are close.
|
|
static const float beam_spot_power_static = 1.0/3.0; // range (0, 16]
|
|
// Generalized Gaussian max shape parameters: Higher values give flatter
|
|
// scanline plateaus and steeper dropoffs, simultaneously widening and
|
|
// sharpening scanlines at the cost of aliasing. 2.0 is pure Gaussian, and
|
|
// values > ~40.0 cause artifacts with integrals.
|
|
static const float beam_min_shape_static = 2.0; // range [2, 32]
|
|
static const float beam_max_shape_static = 4.0; // range [2, 32]
|
|
// Generalized Gaussian shape power: Affects how quickly the distribution
|
|
// changes shape from Gaussian to steep/plateaued as color increases from 0
|
|
// to 1.0. Higher powers appear softer for most colors, and lower powers
|
|
// appear sharper for most colors.
|
|
static const float beam_shape_power_static = 1.0/4.0; // range (0, 16]
|
|
// What filter should be used to sample scanlines horizontally?
|
|
// 0: Quilez (fast), 1: Gaussian (configurable), 2: Lanczos2 (sharp)
|
|
static const float beam_horiz_filter_static = 0.0;
|
|
// Standard deviation for horizontal Gaussian resampling:
|
|
static const float beam_horiz_sigma_static = 0.35; // range (0, 2/3]
|
|
// Do horizontal scanline sampling in linear RGB (correct light mixing),
|
|
// gamma-encoded RGB (darker, hard spot shape, may better match bandwidth-
|
|
// limiting circuitry in some CRT's), or a weighted avg.?
|
|
static const float beam_horiz_linear_rgb_weight_static = 1.0; // range [0, 1]
|
|
// Simulate scanline misconvergence? This needs 3x horizontal texture
|
|
// samples and 3x texture samples of BLOOM_APPROX and HALATION_BLUR in
|
|
// later passes (static option only for now).
|
|
static const bool beam_misconvergence = true;
|
|
// Convergence offsets in x/y directions for R/G/B scanline beams in units
|
|
// of scanlines. Positive offsets go right/down; ranges [-2, 2]
|
|
static const float2 convergence_offsets_r_static = float2(0.1, 0.2);
|
|
static const float2 convergence_offsets_g_static = float2(0.3, 0.4);
|
|
static const float2 convergence_offsets_b_static = float2(0.5, 0.6);
|
|
// Detect interlacing (static option only for now)?
|
|
static const bool interlace_detect = true;
|
|
// Assume 1080-line sources are interlaced?
|
|
static const bool interlace_1080i_static = false;
|
|
// For interlaced sources, assume TFF (top-field first) or BFF order?
|
|
// (Whether this matters depends on the nature of the interlaced input.)
|
|
static const bool interlace_bff_static = false;
|
|
|
|
// ANTIALIASING:
|
|
// What AA level do you want for curvature/overscan/subpixels? Options:
|
|
// 0x (none), 1x (sample subpixels), 4x, 5x, 6x, 7x, 8x, 12x, 16x, 20x, 24x
|
|
// (Static option only for now)
|
|
static const float aa_level = 12.0; // range [0, 24]
|
|
// What antialiasing filter do you want (static option only)? Options:
|
|
// 0: Box (separable), 1: Box (cylindrical),
|
|
// 2: Tent (separable), 3: Tent (cylindrical),
|
|
// 4: Gaussian (separable), 5: Gaussian (cylindrical),
|
|
// 6: Cubic* (separable), 7: Cubic* (cylindrical, poor)
|
|
// 8: Lanczos Sinc (separable), 9: Lanczos Jinc (cylindrical, poor)
|
|
// * = Especially slow with RUNTIME_ANTIALIAS_WEIGHTS
|
|
static const float aa_filter = 6.0; // range [0, 9]
|
|
// Flip the sample grid on odd/even frames (static option only for now)?
|
|
static const bool aa_temporal = false;
|
|
// Use RGB subpixel offsets for antialiasing? The pixel is at green, and
|
|
// the blue offset is the negative r offset; range [0, 0.5]
|
|
static const float2 aa_subpixel_r_offset_static = float2(-1.0/3.0, 0.0);//float2(0.0);
|
|
// Cubics: See http://www.imagemagick.org/Usage/filter/#mitchell
|
|
// 1.) "Keys cubics" with B = 1 - 2C are considered the highest quality.
|
|
// 2.) C = 0.5 (default) is Catmull-Rom; higher C's apply sharpening.
|
|
// 3.) C = 1.0/3.0 is the Mitchell-Netravali filter.
|
|
// 4.) C = 0.0 is a soft spline filter.
|
|
static const float aa_cubic_c_static = 0.5; // range [0, 4]
|
|
// Standard deviation for Gaussian antialiasing: Try 0.5/aa_pixel_diameter.
|
|
static const float aa_gauss_sigma_static = 0.5; // range [0.0625, 1.0]
|
|
|
|
// PHOSPHOR MASK:
|
|
// Mask type: 0 = aperture grille, 1 = slot mask, 2 = EDP shadow mask
|
|
static const float mask_type_static = 1.0; // range [0, 2]
|
|
// We can sample the mask three ways. Pick 2/3 from: Pretty/Fast/Flexible.
|
|
// 0.) Sinc-resize to the desired dot pitch manually (pretty/slow/flexible).
|
|
// This requires PHOSPHOR_MASK_MANUALLY_RESIZE to be #defined.
|
|
// 1.) Hardware-resize to the desired dot pitch (ugly/fast/flexible). This
|
|
// is halfway decent with LUT mipmapping but atrocious without it.
|
|
// 2.) Tile it without resizing at a 1:1 texel:pixel ratio for flat coords
|
|
// (pretty/fast/inflexible). Each input LUT has a fixed dot pitch.
|
|
// This mode reuses the same masks, so triads will be enormous unless
|
|
// you change the mask LUT filenames in your .cgp file.
|
|
static const float mask_sample_mode_static = 0.0; // range [0, 2]
|
|
// Prefer setting the triad size (0.0) or number on the screen (1.0)?
|
|
// If RUNTIME_PHOSPHOR_BLOOM_SIGMA isn't #defined, the specified triad size
|
|
// will always be used to calculate the full bloom sigma statically.
|
|
static const float mask_specify_num_triads_static = 0.0; // range [0, 1]
|
|
// Specify the phosphor triad size, in pixels. Each tile (usually with 8
|
|
// triads) will be rounded to the nearest integer tile size and clamped to
|
|
// obey minimum size constraints (imposed to reduce downsize taps) and
|
|
// maximum size constraints (imposed to have a sane MASK_RESIZE FBO size).
|
|
// To increase the size limit, double the viewport-relative scales for the
|
|
// two MASK_RESIZE passes in crt-royale.cgp and user-cgp-contants.h.
|
|
// range [1, mask_texture_small_size/mask_triads_per_tile]
|
|
static const float mask_triad_size_desired_static = 24.0 / 8.0;
|
|
// If mask_specify_num_triads is 1.0/true, we'll go by this instead (the
|
|
// final size will be rounded and constrained as above); default 480.0
|
|
static const float mask_num_triads_desired_static = 480.0;
|
|
// How many lobes should the sinc/Lanczos resizer use? More lobes require
|
|
// more samples and avoid moire a bit better, but some is unavoidable
|
|
// depending on the destination size (static option for now).
|
|
static const float mask_sinc_lobes = 3.0; // range [2, 4]
|
|
// The mask is resized using a variable number of taps in each dimension,
|
|
// but some Cg profiles always fetch a constant number of taps no matter
|
|
// what (no dynamic branching). We can limit the maximum number of taps if
|
|
// we statically limit the minimum phosphor triad size. Larger values are
|
|
// faster, but the limit IS enforced (static option only, forever);
|
|
// range [1, mask_texture_small_size/mask_triads_per_tile]
|
|
// TODO: Make this 1.0 and compensate with smarter sampling!
|
|
static const float mask_min_allowed_triad_size = 2.0;
|
|
|
|
// GEOMETRY:
|
|
// Geometry mode:
|
|
// 0: Off (default), 1: Spherical mapping (like cgwg's),
|
|
// 2: Alt. spherical mapping (more bulbous), 3: Cylindrical/Trinitron
|
|
static const float geom_mode_static = 0.0; // range [0, 3]
|
|
// Radius of curvature: Measured in units of your viewport's diagonal size.
|
|
static const float geom_radius_static = 2.0; // range [1/(2*pi), 1024]
|
|
// View dist is the distance from the player to their physical screen, in
|
|
// units of the viewport's diagonal size. It controls the field of view.
|
|
static const float geom_view_dist_static = 2.0; // range [0.5, 1024]
|
|
// Tilt angle in radians (clockwise around up and right vectors):
|
|
static const float2 geom_tilt_angle_static = float2(0.0, 0.0); // range [-pi, pi]
|
|
// Aspect ratio: When the true viewport size is unknown, this value is used
|
|
// to help convert between the phosphor triad size and count, along with
|
|
// the mask_resize_viewport_scale constant from user-cgp-constants.h. Set
|
|
// this equal to Retroarch's display aspect ratio (DAR) for best results;
|
|
// range [1, geom_max_aspect_ratio from user-cgp-constants.h];
|
|
// default (256/224)*(54/47) = 1.313069909 (see below)
|
|
static const float geom_aspect_ratio_static = 1.313069909;
|
|
// Before getting into overscan, here's some general aspect ratio info:
|
|
// - DAR = display aspect ratio = SAR * PAR; as in your Retroarch setting
|
|
// - SAR = storage aspect ratio = DAR / PAR; square pixel emulator frame AR
|
|
// - PAR = pixel aspect ratio = DAR / SAR; holds regardless of cropping
|
|
// Geometry processing has to "undo" the screen-space 2D DAR to calculate
|
|
// 3D view vectors, then reapplies the aspect ratio to the simulated CRT in
|
|
// uv-space. To ensure the source SAR is intended for a ~4:3 DAR, either:
|
|
// a.) Enable Retroarch's "Crop Overscan"
|
|
// b.) Readd horizontal padding: Set overscan to e.g. N*(1.0, 240.0/224.0)
|
|
// Real consoles use horizontal black padding in the signal, but emulators
|
|
// often crop this without cropping the vertical padding; a 256x224 [S]NES
|
|
// frame (8:7 SAR) is intended for a ~4:3 DAR, but a 256x240 frame is not.
|
|
// The correct [S]NES PAR is 54:47, found by blargg and NewRisingSun:
|
|
// http://board.zsnes.com/phpBB3/viewtopic.php?f=22&t=11928&start=50
|
|
// http://forums.nesdev.com/viewtopic.php?p=24815#p24815
|
|
// For flat output, it's okay to set DAR = [existing] SAR * [correct] PAR
|
|
// without doing a. or b., but horizontal image borders will be tighter
|
|
// than vertical ones, messing up curvature and overscan. Fixing the
|
|
// padding first corrects this.
|
|
// Overscan: Amount to "zoom in" before cropping. You can zoom uniformly
|
|
// or adjust x/y independently to e.g. readd horizontal padding, as noted
|
|
// above: Values < 1.0 zoom out; range (0, inf)
|
|
static const float2 geom_overscan_static = float2(1.0, 1.0);// * 1.005 * (1.0, 240/224.0)
|
|
// Compute a proper pixel-space to texture-space matrix even without ddx()/
|
|
// ddy()? This is ~8.5% slower but improves antialiasing/subpixel filtering
|
|
// with strong curvature (static option only for now).
|
|
static const bool geom_force_correct_tangent_matrix = true;
|
|
|
|
// BORDERS:
|
|
// Rounded border size in texture uv coords:
|
|
static const float border_size_static = 0.015; // range [0, 0.5]
|
|
// Border darkness: Moderate values darken the border smoothly, and high
|
|
// values make the image very dark just inside the border:
|
|
static const float border_darkness_static = 2.0; // range [0, inf)
|
|
// Border compression: High numbers compress border transitions, narrowing
|
|
// the dark border area.
|
|
static const float border_compress_static = 2.5; // range [1, inf)
|
|
|
|
|
|
#endif // USER_SETTINGS_H
|
|
|
|
//////////////////////////// END USER-SETTINGS //////////////////////////
|
|
|
|
//#include "derived-settings-and-constants.h"
|
|
|
|
//////////////////// BEGIN DERIVED-SETTINGS-AND-CONSTANTS ////////////////////
|
|
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#ifndef DERIVED_SETTINGS_AND_CONSTANTS_H
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#define DERIVED_SETTINGS_AND_CONSTANTS_H
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///////////////////////////// GPL LICENSE NOTICE /////////////////////////////
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// crt-royale: A full-featured CRT shader, with cheese.
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// Copyright (C) 2014 TroggleMonkey <trogglemonkey@gmx.com>
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//
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// This program is free software; you can redistribute it and/or modify it
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// under the terms of the GNU General Public License as published by the Free
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// Software Foundation; either version 2 of the License, or any later version.
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//
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// This program is distributed in the hope that it will be useful, but WITHOUT
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// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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// more details.
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//
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// You should have received a copy of the GNU General Public License along with
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// this program; if not, write to the Free Software Foundation, Inc., 59 Temple
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// Place, Suite 330, Boston, MA 02111-1307 USA
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///////////////////////////////// DESCRIPTION ////////////////////////////////
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// These macros and constants can be used across the whole codebase.
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// Unlike the values in user-settings.cgh, end users shouldn't modify these.
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/////////////////////////////// BEGIN INCLUDES ///////////////////////////////
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//#include "../user-settings.h"
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///////////////////////////// BEGIN USER-SETTINGS ////////////////////////////
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#ifndef USER_SETTINGS_H
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#define USER_SETTINGS_H
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///////////////////////////// DRIVER CAPABILITIES ////////////////////////////
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// The Cg compiler uses different "profiles" with different capabilities.
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// This shader requires a Cg compilation profile >= arbfp1, but a few options
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// require higher profiles like fp30 or fp40. The shader can't detect profile
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// or driver capabilities, so instead you must comment or uncomment the lines
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// below with "//" before "#define." Disable an option if you get compilation
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// errors resembling those listed. Generally speaking, all of these options
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// will run on nVidia cards, but only DRIVERS_ALLOW_TEX2DBIAS (if that) is
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// likely to run on ATI/AMD, due to the Cg compiler's profile limitations.
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// Derivatives: Unsupported on fp20, ps_1_1, ps_1_2, ps_1_3, and arbfp1.
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// Among other things, derivatives help us fix anisotropic filtering artifacts
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// with curved manually tiled phosphor mask coords. Related errors:
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// error C3004: function "float2 ddx(float2);" not supported in this profile
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// error C3004: function "float2 ddy(float2);" not supported in this profile
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//#define DRIVERS_ALLOW_DERIVATIVES
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// Fine derivatives: Unsupported on older ATI cards.
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// Fine derivatives enable 2x2 fragment block communication, letting us perform
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// fast single-pass blur operations. If your card uses coarse derivatives and
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// these are enabled, blurs could look broken. Derivatives are a prerequisite.
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#ifdef DRIVERS_ALLOW_DERIVATIVES
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#define DRIVERS_ALLOW_FINE_DERIVATIVES
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#endif
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// Dynamic looping: Requires an fp30 or newer profile.
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// This makes phosphor mask resampling faster in some cases. Related errors:
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// error C5013: profile does not support "for" statements and "for" could not
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// be unrolled
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//#define DRIVERS_ALLOW_DYNAMIC_BRANCHES
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// Without DRIVERS_ALLOW_DYNAMIC_BRANCHES, we need to use unrollable loops.
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// Using one static loop avoids overhead if the user is right, but if the user
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// is wrong (loops are allowed), breaking a loop into if-blocked pieces with a
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// binary search can potentially save some iterations. However, it may fail:
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// error C6001: Temporary register limit of 32 exceeded; 35 registers
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// needed to compile program
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//#define ACCOMODATE_POSSIBLE_DYNAMIC_LOOPS
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// tex2Dlod: Requires an fp40 or newer profile. This can be used to disable
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// anisotropic filtering, thereby fixing related artifacts. Related errors:
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// error C3004: function "float4 tex2Dlod(sampler2D, float4);" not supported in
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// this profile
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//#define DRIVERS_ALLOW_TEX2DLOD
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// tex2Dbias: Requires an fp30 or newer profile. This can be used to alleviate
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// artifacts from anisotropic filtering and mipmapping. Related errors:
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// error C3004: function "float4 tex2Dbias(sampler2D, float4);" not supported
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// in this profile
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//#define DRIVERS_ALLOW_TEX2DBIAS
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// Integrated graphics compatibility: Integrated graphics like Intel HD 4000
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// impose stricter limitations on register counts and instructions. Enable
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// INTEGRATED_GRAPHICS_COMPATIBILITY_MODE if you still see error C6001 or:
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// error C6002: Instruction limit of 1024 exceeded: 1523 instructions needed
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// to compile program.
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// Enabling integrated graphics compatibility mode will automatically disable:
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// 1.) PHOSPHOR_MASK_MANUALLY_RESIZE: The phosphor mask will be softer.
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// (This may be reenabled in a later release.)
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// 2.) RUNTIME_GEOMETRY_MODE
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// 3.) The high-quality 4x4 Gaussian resize for the bloom approximation
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//#define INTEGRATED_GRAPHICS_COMPATIBILITY_MODE
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//////////////////////////// USER CODEPATH OPTIONS ///////////////////////////
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// To disable a #define option, turn its line into a comment with "//."
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// RUNTIME VS. COMPILE-TIME OPTIONS (Major Performance Implications):
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// Enable runtime shader parameters in the Retroarch (etc.) GUI? They override
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// many of the options in this file and allow real-time tuning, but many of
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// them are slower. Disabling them and using this text file will boost FPS.
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#define RUNTIME_SHADER_PARAMS_ENABLE
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// Specify the phosphor bloom sigma at runtime? This option is 10% slower, but
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// it's the only way to do a wide-enough full bloom with a runtime dot pitch.
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#define RUNTIME_PHOSPHOR_BLOOM_SIGMA
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// Specify antialiasing weight parameters at runtime? (Costs ~20% with cubics)
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#define RUNTIME_ANTIALIAS_WEIGHTS
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// Specify subpixel offsets at runtime? (WARNING: EXTREMELY EXPENSIVE!)
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//#define RUNTIME_ANTIALIAS_SUBPIXEL_OFFSETS
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// Make beam_horiz_filter and beam_horiz_linear_rgb_weight into runtime shader
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// parameters? This will require more math or dynamic branching.
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#define RUNTIME_SCANLINES_HORIZ_FILTER_COLORSPACE
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// Specify the tilt at runtime? This makes things about 3% slower.
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#define RUNTIME_GEOMETRY_TILT
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// Specify the geometry mode at runtime?
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#define RUNTIME_GEOMETRY_MODE
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// Specify the phosphor mask type (aperture grille, slot mask, shadow mask) and
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// mode (Lanczos-resize, hardware resize, or tile 1:1) at runtime, even without
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// dynamic branches? This is cheap if mask_resize_viewport_scale is small.
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#define FORCE_RUNTIME_PHOSPHOR_MASK_MODE_TYPE_SELECT
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// PHOSPHOR MASK:
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// Manually resize the phosphor mask for best results (slower)? Disabling this
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// removes the option to do so, but it may be faster without dynamic branches.
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#define PHOSPHOR_MASK_MANUALLY_RESIZE
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// If we sinc-resize the mask, should we Lanczos-window it (slower but better)?
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#define PHOSPHOR_MASK_RESIZE_LANCZOS_WINDOW
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// Larger blurs are expensive, but we need them to blur larger triads. We can
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// detect the right blur if the triad size is static or our profile allows
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// dynamic branches, but otherwise we use the largest blur the user indicates
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// they might need:
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#define PHOSPHOR_BLOOM_TRIADS_LARGER_THAN_3_PIXELS
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//#define PHOSPHOR_BLOOM_TRIADS_LARGER_THAN_6_PIXELS
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//#define PHOSPHOR_BLOOM_TRIADS_LARGER_THAN_9_PIXELS
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//#define PHOSPHOR_BLOOM_TRIADS_LARGER_THAN_12_PIXELS
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// Here's a helpful chart:
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// MaxTriadSize BlurSize MinTriadCountsByResolution
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// 3.0 9.0 480/640/960/1920 triads at 1080p/1440p/2160p/4320p, 4:3 aspect
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// 6.0 17.0 240/320/480/960 triads at 1080p/1440p/2160p/4320p, 4:3 aspect
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// 9.0 25.0 160/213/320/640 triads at 1080p/1440p/2160p/4320p, 4:3 aspect
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// 12.0 31.0 120/160/240/480 triads at 1080p/1440p/2160p/4320p, 4:3 aspect
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// 18.0 43.0 80/107/160/320 triads at 1080p/1440p/2160p/4320p, 4:3 aspect
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/////////////////////////////// USER PARAMETERS //////////////////////////////
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// Note: Many of these static parameters are overridden by runtime shader
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// parameters when those are enabled. However, many others are static codepath
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// options that were cleaner or more convert to code as static constants.
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// GAMMA:
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static const float crt_gamma_static = 2.5; // range [1, 5]
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static const float lcd_gamma_static = 2.2; // range [1, 5]
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// LEVELS MANAGEMENT:
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// Control the final multiplicative image contrast:
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static const float levels_contrast_static = 1.0; // range [0, 4)
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// We auto-dim to avoid clipping between passes and restore brightness
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// later. Control the dim factor here: Lower values clip less but crush
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// blacks more (static only for now).
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static const float levels_autodim_temp = 0.5; // range (0, 1] default is 0.5 but that was unnecessarily dark for me, so I set it to 1.0
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// HALATION/DIFFUSION/BLOOM:
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// Halation weight: How much energy should be lost to electrons bounding
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// around under the CRT glass and exciting random phosphors?
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static const float halation_weight_static = 0.0; // range [0, 1]
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// Refractive diffusion weight: How much light should spread/diffuse from
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// refracting through the CRT glass?
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static const float diffusion_weight_static = 0.075; // range [0, 1]
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// Underestimate brightness: Bright areas bloom more, but we can base the
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// bloom brightpass on a lower brightness to sharpen phosphors, or a higher
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// brightness to soften them. Low values clip, but >= 0.8 looks okay.
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static const float bloom_underestimate_levels_static = 0.8; // range [0, 5]
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// Blur all colors more than necessary for a softer phosphor bloom?
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static const float bloom_excess_static = 0.0; // range [0, 1]
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// The BLOOM_APPROX pass approximates a phosphor blur early on with a small
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// blurred resize of the input (convergence offsets are applied as well).
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// There are three filter options (static option only for now):
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// 0.) Bilinear resize: A fast, close approximation to a 4x4 resize
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// if min_allowed_viewport_triads and the BLOOM_APPROX resolution are sane
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// and beam_max_sigma is low.
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// 1.) 3x3 resize blur: Medium speed, soft/smeared from bilinear blurring,
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// always uses a static sigma regardless of beam_max_sigma or
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// mask_num_triads_desired.
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// 2.) True 4x4 Gaussian resize: Slowest, technically correct.
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// These options are more pronounced for the fast, unbloomed shader version.
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#ifndef RADEON_FIX
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static const float bloom_approx_filter_static = 2.0;
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#else
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static const float bloom_approx_filter_static = 1.0;
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#endif
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// ELECTRON BEAM SCANLINE DISTRIBUTION:
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// How many scanlines should contribute light to each pixel? Using more
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// scanlines is slower (especially for a generalized Gaussian) but less
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// distorted with larger beam sigmas (especially for a pure Gaussian). The
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// max_beam_sigma at which the closest unused weight is guaranteed <
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// 1.0/255.0 (for a 3x antialiased pure Gaussian) is:
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// 2 scanlines: max_beam_sigma = 0.2089; distortions begin ~0.34; 141.7 FPS pure, 131.9 FPS generalized
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// 3 scanlines, max_beam_sigma = 0.3879; distortions begin ~0.52; 137.5 FPS pure; 123.8 FPS generalized
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// 4 scanlines, max_beam_sigma = 0.5723; distortions begin ~0.70; 134.7 FPS pure; 117.2 FPS generalized
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// 5 scanlines, max_beam_sigma = 0.7591; distortions begin ~0.89; 131.6 FPS pure; 112.1 FPS generalized
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// 6 scanlines, max_beam_sigma = 0.9483; distortions begin ~1.08; 127.9 FPS pure; 105.6 FPS generalized
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static const float beam_num_scanlines = 3.0; // range [2, 6]
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// A generalized Gaussian beam varies shape with color too, now just width.
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// It's slower but more flexible (static option only for now).
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static const bool beam_generalized_gaussian = true;
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// What kind of scanline antialiasing do you want?
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// 0: Sample weights at 1x; 1: Sample weights at 3x; 2: Compute an integral
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// Integrals are slow (especially for generalized Gaussians) and rarely any
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// better than 3x antialiasing (static option only for now).
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static const float beam_antialias_level = 1.0; // range [0, 2]
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// Min/max standard deviations for scanline beams: Higher values widen and
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// soften scanlines. Depending on other options, low min sigmas can alias.
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static const float beam_min_sigma_static = 0.02; // range (0, 1]
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static const float beam_max_sigma_static = 0.3; // range (0, 1]
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// Beam width varies as a function of color: A power function (0) is more
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// configurable, but a spherical function (1) gives the widest beam
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// variability without aliasing (static option only for now).
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static const float beam_spot_shape_function = 0.0;
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// Spot shape power: Powers <= 1 give smoother spot shapes but lower
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// sharpness. Powers >= 1.0 are awful unless mix/max sigmas are close.
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static const float beam_spot_power_static = 1.0/3.0; // range (0, 16]
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// Generalized Gaussian max shape parameters: Higher values give flatter
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// scanline plateaus and steeper dropoffs, simultaneously widening and
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// sharpening scanlines at the cost of aliasing. 2.0 is pure Gaussian, and
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// values > ~40.0 cause artifacts with integrals.
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static const float beam_min_shape_static = 2.0; // range [2, 32]
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static const float beam_max_shape_static = 4.0; // range [2, 32]
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// Generalized Gaussian shape power: Affects how quickly the distribution
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// changes shape from Gaussian to steep/plateaued as color increases from 0
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// to 1.0. Higher powers appear softer for most colors, and lower powers
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// appear sharper for most colors.
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static const float beam_shape_power_static = 1.0/4.0; // range (0, 16]
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// What filter should be used to sample scanlines horizontally?
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// 0: Quilez (fast), 1: Gaussian (configurable), 2: Lanczos2 (sharp)
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static const float beam_horiz_filter_static = 0.0;
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// Standard deviation for horizontal Gaussian resampling:
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static const float beam_horiz_sigma_static = 0.35; // range (0, 2/3]
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// Do horizontal scanline sampling in linear RGB (correct light mixing),
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// gamma-encoded RGB (darker, hard spot shape, may better match bandwidth-
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// limiting circuitry in some CRT's), or a weighted avg.?
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static const float beam_horiz_linear_rgb_weight_static = 1.0; // range [0, 1]
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// Simulate scanline misconvergence? This needs 3x horizontal texture
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// samples and 3x texture samples of BLOOM_APPROX and HALATION_BLUR in
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// later passes (static option only for now).
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static const bool beam_misconvergence = true;
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// Convergence offsets in x/y directions for R/G/B scanline beams in units
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// of scanlines. Positive offsets go right/down; ranges [-2, 2]
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static const float2 convergence_offsets_r_static = float2(0.1, 0.2);
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static const float2 convergence_offsets_g_static = float2(0.3, 0.4);
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static const float2 convergence_offsets_b_static = float2(0.5, 0.6);
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// Detect interlacing (static option only for now)?
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static const bool interlace_detect = true;
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// Assume 1080-line sources are interlaced?
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static const bool interlace_1080i_static = false;
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// For interlaced sources, assume TFF (top-field first) or BFF order?
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// (Whether this matters depends on the nature of the interlaced input.)
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static const bool interlace_bff_static = false;
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// ANTIALIASING:
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// What AA level do you want for curvature/overscan/subpixels? Options:
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// 0x (none), 1x (sample subpixels), 4x, 5x, 6x, 7x, 8x, 12x, 16x, 20x, 24x
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// (Static option only for now)
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static const float aa_level = 12.0; // range [0, 24]
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// What antialiasing filter do you want (static option only)? Options:
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// 0: Box (separable), 1: Box (cylindrical),
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// 2: Tent (separable), 3: Tent (cylindrical),
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// 4: Gaussian (separable), 5: Gaussian (cylindrical),
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// 6: Cubic* (separable), 7: Cubic* (cylindrical, poor)
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// 8: Lanczos Sinc (separable), 9: Lanczos Jinc (cylindrical, poor)
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// * = Especially slow with RUNTIME_ANTIALIAS_WEIGHTS
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static const float aa_filter = 6.0; // range [0, 9]
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// Flip the sample grid on odd/even frames (static option only for now)?
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static const bool aa_temporal = false;
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// Use RGB subpixel offsets for antialiasing? The pixel is at green, and
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// the blue offset is the negative r offset; range [0, 0.5]
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static const float2 aa_subpixel_r_offset_static = float2(-1.0/3.0, 0.0);//float2(0.0);
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// Cubics: See http://www.imagemagick.org/Usage/filter/#mitchell
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// 1.) "Keys cubics" with B = 1 - 2C are considered the highest quality.
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// 2.) C = 0.5 (default) is Catmull-Rom; higher C's apply sharpening.
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// 3.) C = 1.0/3.0 is the Mitchell-Netravali filter.
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// 4.) C = 0.0 is a soft spline filter.
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static const float aa_cubic_c_static = 0.5; // range [0, 4]
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// Standard deviation for Gaussian antialiasing: Try 0.5/aa_pixel_diameter.
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static const float aa_gauss_sigma_static = 0.5; // range [0.0625, 1.0]
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// PHOSPHOR MASK:
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// Mask type: 0 = aperture grille, 1 = slot mask, 2 = EDP shadow mask
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static const float mask_type_static = 1.0; // range [0, 2]
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// We can sample the mask three ways. Pick 2/3 from: Pretty/Fast/Flexible.
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// 0.) Sinc-resize to the desired dot pitch manually (pretty/slow/flexible).
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// This requires PHOSPHOR_MASK_MANUALLY_RESIZE to be #defined.
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// 1.) Hardware-resize to the desired dot pitch (ugly/fast/flexible). This
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// is halfway decent with LUT mipmapping but atrocious without it.
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// 2.) Tile it without resizing at a 1:1 texel:pixel ratio for flat coords
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// (pretty/fast/inflexible). Each input LUT has a fixed dot pitch.
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// This mode reuses the same masks, so triads will be enormous unless
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// you change the mask LUT filenames in your .cgp file.
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static const float mask_sample_mode_static = 0.0; // range [0, 2]
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// Prefer setting the triad size (0.0) or number on the screen (1.0)?
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// If RUNTIME_PHOSPHOR_BLOOM_SIGMA isn't #defined, the specified triad size
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// will always be used to calculate the full bloom sigma statically.
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static const float mask_specify_num_triads_static = 0.0; // range [0, 1]
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// Specify the phosphor triad size, in pixels. Each tile (usually with 8
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// triads) will be rounded to the nearest integer tile size and clamped to
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// obey minimum size constraints (imposed to reduce downsize taps) and
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// maximum size constraints (imposed to have a sane MASK_RESIZE FBO size).
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// To increase the size limit, double the viewport-relative scales for the
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// two MASK_RESIZE passes in crt-royale.cgp and user-cgp-contants.h.
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// range [1, mask_texture_small_size/mask_triads_per_tile]
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static const float mask_triad_size_desired_static = 24.0 / 8.0;
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// If mask_specify_num_triads is 1.0/true, we'll go by this instead (the
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// final size will be rounded and constrained as above); default 480.0
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static const float mask_num_triads_desired_static = 480.0;
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// How many lobes should the sinc/Lanczos resizer use? More lobes require
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// more samples and avoid moire a bit better, but some is unavoidable
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// depending on the destination size (static option for now).
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static const float mask_sinc_lobes = 3.0; // range [2, 4]
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// The mask is resized using a variable number of taps in each dimension,
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// but some Cg profiles always fetch a constant number of taps no matter
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// what (no dynamic branching). We can limit the maximum number of taps if
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// we statically limit the minimum phosphor triad size. Larger values are
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// faster, but the limit IS enforced (static option only, forever);
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// range [1, mask_texture_small_size/mask_triads_per_tile]
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// TODO: Make this 1.0 and compensate with smarter sampling!
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static const float mask_min_allowed_triad_size = 2.0;
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// GEOMETRY:
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// Geometry mode:
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// 0: Off (default), 1: Spherical mapping (like cgwg's),
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// 2: Alt. spherical mapping (more bulbous), 3: Cylindrical/Trinitron
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static const float geom_mode_static = 0.0; // range [0, 3]
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// Radius of curvature: Measured in units of your viewport's diagonal size.
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static const float geom_radius_static = 2.0; // range [1/(2*pi), 1024]
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// View dist is the distance from the player to their physical screen, in
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// units of the viewport's diagonal size. It controls the field of view.
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static const float geom_view_dist_static = 2.0; // range [0.5, 1024]
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// Tilt angle in radians (clockwise around up and right vectors):
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|
static const float2 geom_tilt_angle_static = float2(0.0, 0.0); // range [-pi, pi]
|
|
// Aspect ratio: When the true viewport size is unknown, this value is used
|
|
// to help convert between the phosphor triad size and count, along with
|
|
// the mask_resize_viewport_scale constant from user-cgp-constants.h. Set
|
|
// this equal to Retroarch's display aspect ratio (DAR) for best results;
|
|
// range [1, geom_max_aspect_ratio from user-cgp-constants.h];
|
|
// default (256/224)*(54/47) = 1.313069909 (see below)
|
|
static const float geom_aspect_ratio_static = 1.313069909;
|
|
// Before getting into overscan, here's some general aspect ratio info:
|
|
// - DAR = display aspect ratio = SAR * PAR; as in your Retroarch setting
|
|
// - SAR = storage aspect ratio = DAR / PAR; square pixel emulator frame AR
|
|
// - PAR = pixel aspect ratio = DAR / SAR; holds regardless of cropping
|
|
// Geometry processing has to "undo" the screen-space 2D DAR to calculate
|
|
// 3D view vectors, then reapplies the aspect ratio to the simulated CRT in
|
|
// uv-space. To ensure the source SAR is intended for a ~4:3 DAR, either:
|
|
// a.) Enable Retroarch's "Crop Overscan"
|
|
// b.) Readd horizontal padding: Set overscan to e.g. N*(1.0, 240.0/224.0)
|
|
// Real consoles use horizontal black padding in the signal, but emulators
|
|
// often crop this without cropping the vertical padding; a 256x224 [S]NES
|
|
// frame (8:7 SAR) is intended for a ~4:3 DAR, but a 256x240 frame is not.
|
|
// The correct [S]NES PAR is 54:47, found by blargg and NewRisingSun:
|
|
// http://board.zsnes.com/phpBB3/viewtopic.php?f=22&t=11928&start=50
|
|
// http://forums.nesdev.com/viewtopic.php?p=24815#p24815
|
|
// For flat output, it's okay to set DAR = [existing] SAR * [correct] PAR
|
|
// without doing a. or b., but horizontal image borders will be tighter
|
|
// than vertical ones, messing up curvature and overscan. Fixing the
|
|
// padding first corrects this.
|
|
// Overscan: Amount to "zoom in" before cropping. You can zoom uniformly
|
|
// or adjust x/y independently to e.g. readd horizontal padding, as noted
|
|
// above: Values < 1.0 zoom out; range (0, inf)
|
|
static const float2 geom_overscan_static = float2(1.0, 1.0);// * 1.005 * (1.0, 240/224.0)
|
|
// Compute a proper pixel-space to texture-space matrix even without ddx()/
|
|
// ddy()? This is ~8.5% slower but improves antialiasing/subpixel filtering
|
|
// with strong curvature (static option only for now).
|
|
static const bool geom_force_correct_tangent_matrix = true;
|
|
|
|
// BORDERS:
|
|
// Rounded border size in texture uv coords:
|
|
static const float border_size_static = 0.015; // range [0, 0.5]
|
|
// Border darkness: Moderate values darken the border smoothly, and high
|
|
// values make the image very dark just inside the border:
|
|
static const float border_darkness_static = 2.0; // range [0, inf)
|
|
// Border compression: High numbers compress border transitions, narrowing
|
|
// the dark border area.
|
|
static const float border_compress_static = 2.5; // range [1, inf)
|
|
|
|
|
|
#endif // USER_SETTINGS_H
|
|
|
|
///////////////////////////// END USER-SETTINGS ////////////////////////////
|
|
|
|
//#include "user-cgp-constants.h"
|
|
|
|
///////////////////////// BEGIN USER-CGP-CONSTANTS /////////////////////////
|
|
|
|
#ifndef USER_CGP_CONSTANTS_H
|
|
#define USER_CGP_CONSTANTS_H
|
|
|
|
// IMPORTANT:
|
|
// These constants MUST be set appropriately for the settings in crt-royale.cgp
|
|
// (or whatever related .cgp file you're using). If they aren't, you're likely
|
|
// to get artifacts, the wrong phosphor mask size, etc. I wish these could be
|
|
// set directly in the .cgp file to make things easier, but...they can't.
|
|
|
|
// PASS SCALES AND RELATED CONSTANTS:
|
|
// Copy the absolute scale_x for BLOOM_APPROX. There are two major versions of
|
|
// this shader: One does a viewport-scale bloom, and the other skips it. The
|
|
// latter benefits from a higher bloom_approx_scale_x, so save both separately:
|
|
static const float bloom_approx_size_x = 320.0;
|
|
static const float bloom_approx_size_x_for_fake = 400.0;
|
|
// Copy the viewport-relative scales of the phosphor mask resize passes
|
|
// (MASK_RESIZE and the pass immediately preceding it):
|
|
static const float2 mask_resize_viewport_scale = float2(0.0625, 0.0625);
|
|
// Copy the geom_max_aspect_ratio used to calculate the MASK_RESIZE scales, etc.:
|
|
static const float geom_max_aspect_ratio = 4.0/3.0;
|
|
|
|
// PHOSPHOR MASK TEXTURE CONSTANTS:
|
|
// Set the following constants to reflect the properties of the phosphor mask
|
|
// texture named in crt-royale.cgp. The shader optionally resizes a mask tile
|
|
// based on user settings, then repeats a single tile until filling the screen.
|
|
// The shader must know the input texture size (default 64x64), and to manually
|
|
// resize, it must also know the horizontal triads per tile (default 8).
|
|
static const float2 mask_texture_small_size = float2(64.0, 64.0);
|
|
static const float2 mask_texture_large_size = float2(512.0, 512.0);
|
|
static const float mask_triads_per_tile = 8.0;
|
|
// We need the average brightness of the phosphor mask to compensate for the
|
|
// dimming it causes. The following four values are roughly correct for the
|
|
// masks included with the shader. Update the value for any LUT texture you
|
|
// change. [Un]comment "#define PHOSPHOR_MASK_GRILLE14" depending on whether
|
|
// the loaded aperture grille uses 14-pixel or 15-pixel stripes (default 15).
|
|
//#define PHOSPHOR_MASK_GRILLE14
|
|
static const float mask_grille14_avg_color = 50.6666666/255.0;
|
|
// TileableLinearApertureGrille14Wide7d33Spacing*.png
|
|
// TileableLinearApertureGrille14Wide10And6Spacing*.png
|
|
static const float mask_grille15_avg_color = 53.0/255.0;
|
|
// TileableLinearApertureGrille15Wide6d33Spacing*.png
|
|
// TileableLinearApertureGrille15Wide8And5d5Spacing*.png
|
|
static const float mask_slot_avg_color = 46.0/255.0;
|
|
// TileableLinearSlotMask15Wide9And4d5Horizontal8VerticalSpacing*.png
|
|
// TileableLinearSlotMaskTall15Wide9And4d5Horizontal9d14VerticalSpacing*.png
|
|
static const float mask_shadow_avg_color = 41.0/255.0;
|
|
// TileableLinearShadowMask*.png
|
|
// TileableLinearShadowMaskEDP*.png
|
|
|
|
#ifdef PHOSPHOR_MASK_GRILLE14
|
|
static const float mask_grille_avg_color = mask_grille14_avg_color;
|
|
#else
|
|
static const float mask_grille_avg_color = mask_grille15_avg_color;
|
|
#endif
|
|
|
|
|
|
#endif // USER_CGP_CONSTANTS_H
|
|
|
|
////////////////////////// END USER-CGP-CONSTANTS //////////////////////////
|
|
|
|
//////////////////////////////// END INCLUDES ////////////////////////////////
|
|
|
|
/////////////////////////////// FIXED SETTINGS ///////////////////////////////
|
|
|
|
// Avoid dividing by zero; using a macro overloads for float, float2, etc.:
|
|
#define FIX_ZERO(c) (max(abs(c), 0.0000152587890625)) // 2^-16
|
|
|
|
// Ensure the first pass decodes CRT gamma and the last encodes LCD gamma.
|
|
#ifndef SIMULATE_CRT_ON_LCD
|
|
#define SIMULATE_CRT_ON_LCD
|
|
#endif
|
|
|
|
// Manually tiling a manually resized texture creates texture coord derivative
|
|
// discontinuities and confuses anisotropic filtering, causing discolored tile
|
|
// seams in the phosphor mask. Workarounds:
|
|
// a.) Using tex2Dlod disables anisotropic filtering for tiled masks. It's
|
|
// downgraded to tex2Dbias without DRIVERS_ALLOW_TEX2DLOD #defined and
|
|
// disabled without DRIVERS_ALLOW_TEX2DBIAS #defined either.
|
|
// b.) "Tile flat twice" requires drawing two full tiles without border padding
|
|
// to the resized mask FBO, and it's incompatible with same-pass curvature.
|
|
// (Same-pass curvature isn't used but could be in the future...maybe.)
|
|
// c.) "Fix discontinuities" requires derivatives and drawing one tile with
|
|
// border padding to the resized mask FBO, but it works with same-pass
|
|
// curvature. It's disabled without DRIVERS_ALLOW_DERIVATIVES #defined.
|
|
// Precedence: a, then, b, then c (if multiple strategies are #defined).
|
|
#define ANISOTROPIC_TILING_COMPAT_TEX2DLOD // 129.7 FPS, 4x, flat; 101.8 at fullscreen
|
|
#define ANISOTROPIC_TILING_COMPAT_TILE_FLAT_TWICE // 128.1 FPS, 4x, flat; 101.5 at fullscreen
|
|
#define ANISOTROPIC_TILING_COMPAT_FIX_DISCONTINUITIES // 124.4 FPS, 4x, flat; 97.4 at fullscreen
|
|
// Also, manually resampling the phosphor mask is slightly blurrier with
|
|
// anisotropic filtering. (Resampling with mipmapping is even worse: It
|
|
// creates artifacts, but only with the fully bloomed shader.) The difference
|
|
// is subtle with small triads, but you can fix it for a small cost.
|
|
//#define ANISOTROPIC_RESAMPLING_COMPAT_TEX2DLOD
|
|
|
|
|
|
////////////////////////////// DERIVED SETTINGS //////////////////////////////
|
|
|
|
// Intel HD 4000 GPU's can't handle manual mask resizing (for now), setting the
|
|
// geometry mode at runtime, or a 4x4 true Gaussian resize. Disable
|
|
// incompatible settings ASAP. (INTEGRATED_GRAPHICS_COMPATIBILITY_MODE may be
|
|
// #defined by either user-settings.h or a wrapper .cg that #includes the
|
|
// current .cg pass.)
|
|
#ifdef INTEGRATED_GRAPHICS_COMPATIBILITY_MODE
|
|
#ifdef PHOSPHOR_MASK_MANUALLY_RESIZE
|
|
#undef PHOSPHOR_MASK_MANUALLY_RESIZE
|
|
#endif
|
|
#ifdef RUNTIME_GEOMETRY_MODE
|
|
#undef RUNTIME_GEOMETRY_MODE
|
|
#endif
|
|
// Mode 2 (4x4 Gaussian resize) won't work, and mode 1 (3x3 blur) is
|
|
// inferior in most cases, so replace 2.0 with 0.0:
|
|
static const float bloom_approx_filter =
|
|
bloom_approx_filter_static > 1.5 ? 0.0 : bloom_approx_filter_static;
|
|
#else
|
|
static const float bloom_approx_filter = bloom_approx_filter_static;
|
|
#endif
|
|
|
|
// Disable slow runtime paths if static parameters are used. Most of these
|
|
// won't be a problem anyway once the params are disabled, but some will.
|
|
#ifndef RUNTIME_SHADER_PARAMS_ENABLE
|
|
#ifdef RUNTIME_PHOSPHOR_BLOOM_SIGMA
|
|
#undef RUNTIME_PHOSPHOR_BLOOM_SIGMA
|
|
#endif
|
|
#ifdef RUNTIME_ANTIALIAS_WEIGHTS
|
|
#undef RUNTIME_ANTIALIAS_WEIGHTS
|
|
#endif
|
|
#ifdef RUNTIME_ANTIALIAS_SUBPIXEL_OFFSETS
|
|
#undef RUNTIME_ANTIALIAS_SUBPIXEL_OFFSETS
|
|
#endif
|
|
#ifdef RUNTIME_SCANLINES_HORIZ_FILTER_COLORSPACE
|
|
#undef RUNTIME_SCANLINES_HORIZ_FILTER_COLORSPACE
|
|
#endif
|
|
#ifdef RUNTIME_GEOMETRY_TILT
|
|
#undef RUNTIME_GEOMETRY_TILT
|
|
#endif
|
|
#ifdef RUNTIME_GEOMETRY_MODE
|
|
#undef RUNTIME_GEOMETRY_MODE
|
|
#endif
|
|
#ifdef FORCE_RUNTIME_PHOSPHOR_MASK_MODE_TYPE_SELECT
|
|
#undef FORCE_RUNTIME_PHOSPHOR_MASK_MODE_TYPE_SELECT
|
|
#endif
|
|
#endif
|
|
|
|
// Make tex2Dbias a backup for tex2Dlod for wider compatibility.
|
|
#ifdef ANISOTROPIC_TILING_COMPAT_TEX2DLOD
|
|
#define ANISOTROPIC_TILING_COMPAT_TEX2DBIAS
|
|
#endif
|
|
#ifdef ANISOTROPIC_RESAMPLING_COMPAT_TEX2DLOD
|
|
#define ANISOTROPIC_RESAMPLING_COMPAT_TEX2DBIAS
|
|
#endif
|
|
// Rule out unavailable anisotropic compatibility strategies:
|
|
#ifndef DRIVERS_ALLOW_DERIVATIVES
|
|
#ifdef ANISOTROPIC_TILING_COMPAT_FIX_DISCONTINUITIES
|
|
#undef ANISOTROPIC_TILING_COMPAT_FIX_DISCONTINUITIES
|
|
#endif
|
|
#endif
|
|
#ifndef DRIVERS_ALLOW_TEX2DLOD
|
|
#ifdef ANISOTROPIC_TILING_COMPAT_TEX2DLOD
|
|
#undef ANISOTROPIC_TILING_COMPAT_TEX2DLOD
|
|
#endif
|
|
#ifdef ANISOTROPIC_RESAMPLING_COMPAT_TEX2DLOD
|
|
#undef ANISOTROPIC_RESAMPLING_COMPAT_TEX2DLOD
|
|
#endif
|
|
#ifdef ANTIALIAS_DISABLE_ANISOTROPIC
|
|
#undef ANTIALIAS_DISABLE_ANISOTROPIC
|
|
#endif
|
|
#endif
|
|
#ifndef DRIVERS_ALLOW_TEX2DBIAS
|
|
#ifdef ANISOTROPIC_TILING_COMPAT_TEX2DBIAS
|
|
#undef ANISOTROPIC_TILING_COMPAT_TEX2DBIAS
|
|
#endif
|
|
#ifdef ANISOTROPIC_RESAMPLING_COMPAT_TEX2DBIAS
|
|
#undef ANISOTROPIC_RESAMPLING_COMPAT_TEX2DBIAS
|
|
#endif
|
|
#endif
|
|
// Prioritize anisotropic tiling compatibility strategies by performance and
|
|
// disable unused strategies. This concentrates all the nesting in one place.
|
|
#ifdef ANISOTROPIC_TILING_COMPAT_TEX2DLOD
|
|
#ifdef ANISOTROPIC_TILING_COMPAT_TEX2DBIAS
|
|
#undef ANISOTROPIC_TILING_COMPAT_TEX2DBIAS
|
|
#endif
|
|
#ifdef ANISOTROPIC_TILING_COMPAT_TILE_FLAT_TWICE
|
|
#undef ANISOTROPIC_TILING_COMPAT_TILE_FLAT_TWICE
|
|
#endif
|
|
#ifdef ANISOTROPIC_TILING_COMPAT_FIX_DISCONTINUITIES
|
|
#undef ANISOTROPIC_TILING_COMPAT_FIX_DISCONTINUITIES
|
|
#endif
|
|
#else
|
|
#ifdef ANISOTROPIC_TILING_COMPAT_TEX2DBIAS
|
|
#ifdef ANISOTROPIC_TILING_COMPAT_TILE_FLAT_TWICE
|
|
#undef ANISOTROPIC_TILING_COMPAT_TILE_FLAT_TWICE
|
|
#endif
|
|
#ifdef ANISOTROPIC_TILING_COMPAT_FIX_DISCONTINUITIES
|
|
#undef ANISOTROPIC_TILING_COMPAT_FIX_DISCONTINUITIES
|
|
#endif
|
|
#else
|
|
// ANISOTROPIC_TILING_COMPAT_TILE_FLAT_TWICE is only compatible with
|
|
// flat texture coords in the same pass, but that's all we use.
|
|
#ifdef ANISOTROPIC_TILING_COMPAT_TILE_FLAT_TWICE
|
|
#ifdef ANISOTROPIC_TILING_COMPAT_FIX_DISCONTINUITIES
|
|
#undef ANISOTROPIC_TILING_COMPAT_FIX_DISCONTINUITIES
|
|
#endif
|
|
#endif
|
|
#endif
|
|
#endif
|
|
// The tex2Dlod and tex2Dbias strategies share a lot in common, and we can
|
|
// reduce some #ifdef nesting in the next section by essentially OR'ing them:
|
|
#ifdef ANISOTROPIC_TILING_COMPAT_TEX2DLOD
|
|
#define ANISOTROPIC_TILING_COMPAT_TEX2DLOD_FAMILY
|
|
#endif
|
|
#ifdef ANISOTROPIC_TILING_COMPAT_TEX2DBIAS
|
|
#define ANISOTROPIC_TILING_COMPAT_TEX2DLOD_FAMILY
|
|
#endif
|
|
// Prioritize anisotropic resampling compatibility strategies the same way:
|
|
#ifdef ANISOTROPIC_RESAMPLING_COMPAT_TEX2DLOD
|
|
#ifdef ANISOTROPIC_RESAMPLING_COMPAT_TEX2DBIAS
|
|
#undef ANISOTROPIC_RESAMPLING_COMPAT_TEX2DBIAS
|
|
#endif
|
|
#endif
|
|
|
|
|
|
/////////////////////// DERIVED PHOSPHOR MASK CONSTANTS //////////////////////
|
|
|
|
// If we can use the large mipmapped LUT without mipmapping artifacts, we
|
|
// should: It gives us more options for using fewer samples.
|
|
#ifdef DRIVERS_ALLOW_TEX2DLOD
|
|
#ifdef ANISOTROPIC_RESAMPLING_COMPAT_TEX2DLOD
|
|
// TODO: Take advantage of this!
|
|
#define PHOSPHOR_MASK_RESIZE_MIPMAPPED_LUT
|
|
static const float2 mask_resize_src_lut_size = mask_texture_large_size;
|
|
#else
|
|
static const float2 mask_resize_src_lut_size = mask_texture_small_size;
|
|
#endif
|
|
#else
|
|
static const float2 mask_resize_src_lut_size = mask_texture_small_size;
|
|
#endif
|
|
|
|
|
|
// tex2D's sampler2D parameter MUST be a uniform global, a uniform input to
|
|
// main_fragment, or a static alias of one of the above. This makes it hard
|
|
// to select the phosphor mask at runtime: We can't even assign to a uniform
|
|
// global in the vertex shader or select a sampler2D in the vertex shader and
|
|
// pass it to the fragment shader (even with explicit TEXUNIT# bindings),
|
|
// because it just gives us the input texture or a black screen. However, we
|
|
// can get around these limitations by calling tex2D three times with different
|
|
// uniform samplers (or resizing the phosphor mask three times altogether).
|
|
// With dynamic branches, we can process only one of these branches on top of
|
|
// quickly discarding fragments we don't need (cgc seems able to overcome
|
|
// limigations around dependent texture fetches inside of branches). Without
|
|
// dynamic branches, we have to process every branch for every fragment...which
|
|
// is slower. Runtime sampling mode selection is slower without dynamic
|
|
// branches as well. Let the user's static #defines decide if it's worth it.
|
|
#ifdef DRIVERS_ALLOW_DYNAMIC_BRANCHES
|
|
#define RUNTIME_PHOSPHOR_MASK_MODE_TYPE_SELECT
|
|
#else
|
|
#ifdef FORCE_RUNTIME_PHOSPHOR_MASK_MODE_TYPE_SELECT
|
|
#define RUNTIME_PHOSPHOR_MASK_MODE_TYPE_SELECT
|
|
#endif
|
|
#endif
|
|
|
|
// We need to render some minimum number of tiles in the resize passes.
|
|
// We need at least 1.0 just to repeat a single tile, and we need extra
|
|
// padding beyond that for anisotropic filtering, discontinuitity fixing,
|
|
// antialiasing, same-pass curvature (not currently used), etc. First
|
|
// determine how many border texels and tiles we need, based on how the result
|
|
// will be sampled:
|
|
#ifdef GEOMETRY_EARLY
|
|
static const float max_subpixel_offset = aa_subpixel_r_offset_static.x;
|
|
// Most antialiasing filters have a base radius of 4.0 pixels:
|
|
static const float max_aa_base_pixel_border = 4.0 +
|
|
max_subpixel_offset;
|
|
#else
|
|
static const float max_aa_base_pixel_border = 0.0;
|
|
#endif
|
|
// Anisotropic filtering adds about 0.5 to the pixel border:
|
|
#ifndef ANISOTROPIC_TILING_COMPAT_TEX2DLOD_FAMILY
|
|
static const float max_aniso_pixel_border = max_aa_base_pixel_border + 0.5;
|
|
#else
|
|
static const float max_aniso_pixel_border = max_aa_base_pixel_border;
|
|
#endif
|
|
// Fixing discontinuities adds 1.0 more to the pixel border:
|
|
#ifdef ANISOTROPIC_TILING_COMPAT_FIX_DISCONTINUITIES
|
|
static const float max_tiled_pixel_border = max_aniso_pixel_border + 1.0;
|
|
#else
|
|
static const float max_tiled_pixel_border = max_aniso_pixel_border;
|
|
#endif
|
|
// Convert the pixel border to an integer texel border. Assume same-pass
|
|
// curvature about triples the texel frequency:
|
|
#ifdef GEOMETRY_EARLY
|
|
static const float max_mask_texel_border =
|
|
ceil(max_tiled_pixel_border * 3.0);
|
|
#else
|
|
static const float max_mask_texel_border = ceil(max_tiled_pixel_border);
|
|
#endif
|
|
// Convert the texel border to a tile border using worst-case assumptions:
|
|
static const float max_mask_tile_border = max_mask_texel_border/
|
|
(mask_min_allowed_triad_size * mask_triads_per_tile);
|
|
|
|
// Finally, set the number of resized tiles to render to MASK_RESIZE, and set
|
|
// the starting texel (inside borders) for sampling it.
|
|
#ifndef GEOMETRY_EARLY
|
|
#ifdef ANISOTROPIC_TILING_COMPAT_TILE_FLAT_TWICE
|
|
// Special case: Render two tiles without borders. Anisotropic
|
|
// filtering doesn't seem to be a problem here.
|
|
static const float mask_resize_num_tiles = 1.0 + 1.0;
|
|
static const float mask_start_texels = 0.0;
|
|
#else
|
|
static const float mask_resize_num_tiles = 1.0 +
|
|
2.0 * max_mask_tile_border;
|
|
static const float mask_start_texels = max_mask_texel_border;
|
|
#endif
|
|
#else
|
|
static const float mask_resize_num_tiles = 1.0 + 2.0*max_mask_tile_border;
|
|
static const float mask_start_texels = max_mask_texel_border;
|
|
#endif
|
|
|
|
// We have to fit mask_resize_num_tiles into an FBO with a viewport scale of
|
|
// mask_resize_viewport_scale. This limits the maximum final triad size.
|
|
// Estimate the minimum number of triads we can split the screen into in each
|
|
// dimension (we'll be as correct as mask_resize_viewport_scale is):
|
|
static const float mask_resize_num_triads =
|
|
mask_resize_num_tiles * mask_triads_per_tile;
|
|
static const float2 min_allowed_viewport_triads =
|
|
float2(mask_resize_num_triads) / mask_resize_viewport_scale;
|
|
|
|
|
|
//////////////////////// COMMON MATHEMATICAL CONSTANTS ///////////////////////
|
|
|
|
static const float pi = 3.141592653589;
|
|
// We often want to find the location of the previous texel, e.g.:
|
|
// const float2 curr_texel = uv * texture_size;
|
|
// const float2 prev_texel = floor(curr_texel - float2(0.5)) + float2(0.5);
|
|
// const float2 prev_texel_uv = prev_texel / texture_size;
|
|
// However, many GPU drivers round incorrectly around exact texel locations.
|
|
// We need to subtract a little less than 0.5 before flooring, and some GPU's
|
|
// require this value to be farther from 0.5 than others; define it here.
|
|
// const float2 prev_texel =
|
|
// floor(curr_texel - float2(under_half)) + float2(0.5);
|
|
static const float under_half = 0.4995;
|
|
|
|
|
|
#endif // DERIVED_SETTINGS_AND_CONSTANTS_H
|
|
|
|
///////////////////////////// END DERIVED-SETTINGS-AND-CONSTANTS ////////////////////////////
|
|
|
|
//#include "../../../../include/special-functions.h"
|
|
|
|
/////////////////////////// BEGIN SPECIAL-FUNCTIONS //////////////////////////
|
|
|
|
#ifndef SPECIAL_FUNCTIONS_H
|
|
#define SPECIAL_FUNCTIONS_H
|
|
|
|
///////////////////////////////// MIT LICENSE ////////////////////////////////
|
|
|
|
// Copyright (C) 2014 TroggleMonkey
|
|
//
|
|
// Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
// of this software and associated documentation files (the "Software"), to
|
|
// deal in the Software without restriction, including without limitation the
|
|
// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
|
|
// sell copies of the Software, and to permit persons to whom the Software is
|
|
// furnished to do so, subject to the following conditions:
|
|
//
|
|
// The above copyright notice and this permission notice shall be included in
|
|
// all copies or substantial portions of the Software.
|
|
//
|
|
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
|
|
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
|
|
// IN THE SOFTWARE.
|
|
|
|
|
|
///////////////////////////////// DESCRIPTION ////////////////////////////////
|
|
|
|
// This file implements the following mathematical special functions:
|
|
// 1.) erf() = 2/sqrt(pi) * indefinite_integral(e**(-x**2))
|
|
// 2.) gamma(s), a real-numbered extension of the integer factorial function
|
|
// It also implements normalized_ligamma(s, z), a normalized lower incomplete
|
|
// gamma function for s < 0.5 only. Both gamma() and normalized_ligamma() can
|
|
// be called with an _impl suffix to use an implementation version with a few
|
|
// extra precomputed parameters (which may be useful for the caller to reuse).
|
|
// See below for details.
|
|
//
|
|
// Design Rationale:
|
|
// Pretty much every line of code in this file is duplicated four times for
|
|
// different input types (float4/float3/float2/float). This is unfortunate,
|
|
// but Cg doesn't allow function templates. Macros would be far less verbose,
|
|
// but they would make the code harder to document and read. I don't expect
|
|
// these functions will require a whole lot of maintenance changes unless
|
|
// someone ever has need for more robust incomplete gamma functions, so code
|
|
// duplication seems to be the lesser evil in this case.
|
|
|
|
|
|
/////////////////////////// GAUSSIAN ERROR FUNCTION //////////////////////////
|
|
|
|
float4 erf6(float4 x)
|
|
{
|
|
// Requires: x is the standard parameter to erf().
|
|
// Returns: Return an Abramowitz/Stegun approximation of erf(), where:
|
|
// erf(x) = 2/sqrt(pi) * integral(e**(-x**2))
|
|
// This approximation has a max absolute error of 2.5*10**-5
|
|
// with solid numerical robustness and efficiency. See:
|
|
// https://en.wikipedia.org/wiki/Error_function#Approximation_with_elementary_functions
|
|
static const float4 one = float4(1.0);
|
|
const float4 sign_x = sign(x);
|
|
const float4 t = one/(one + 0.47047*abs(x));
|
|
const float4 result = one - t*(0.3480242 + t*(-0.0958798 + t*0.7478556))*
|
|
exp(-(x*x));
|
|
return result * sign_x;
|
|
}
|
|
|
|
float3 erf6(const float3 x)
|
|
{
|
|
// Float3 version:
|
|
static const float3 one = float3(1.0);
|
|
const float3 sign_x = sign(x);
|
|
const float3 t = one/(one + 0.47047*abs(x));
|
|
const float3 result = one - t*(0.3480242 + t*(-0.0958798 + t*0.7478556))*
|
|
exp(-(x*x));
|
|
return result * sign_x;
|
|
}
|
|
|
|
float2 erf6(const float2 x)
|
|
{
|
|
// Float2 version:
|
|
static const float2 one = float2(1.0);
|
|
const float2 sign_x = sign(x);
|
|
const float2 t = one/(one + 0.47047*abs(x));
|
|
const float2 result = one - t*(0.3480242 + t*(-0.0958798 + t*0.7478556))*
|
|
exp(-(x*x));
|
|
return result * sign_x;
|
|
}
|
|
|
|
float erf6(const float x)
|
|
{
|
|
// Float version:
|
|
const float sign_x = sign(x);
|
|
const float t = 1.0/(1.0 + 0.47047*abs(x));
|
|
const float result = 1.0 - t*(0.3480242 + t*(-0.0958798 + t*0.7478556))*
|
|
exp(-(x*x));
|
|
return result * sign_x;
|
|
}
|
|
|
|
float4 erft(const float4 x)
|
|
{
|
|
// Requires: x is the standard parameter to erf().
|
|
// Returns: Approximate erf() with the hyperbolic tangent. The error is
|
|
// visually noticeable, but it's blazing fast and perceptually
|
|
// close...at least on ATI hardware. See:
|
|
// http://www.maplesoft.com/applications/view.aspx?SID=5525&view=html
|
|
// Warning: Only use this if your hardware drivers correctly implement
|
|
// tanh(): My nVidia 8800GTS returns garbage output.
|
|
return tanh(1.202760580 * x);
|
|
}
|
|
|
|
float3 erft(const float3 x)
|
|
{
|
|
// Float3 version:
|
|
return tanh(1.202760580 * x);
|
|
}
|
|
|
|
float2 erft(const float2 x)
|
|
{
|
|
// Float2 version:
|
|
return tanh(1.202760580 * x);
|
|
}
|
|
|
|
float erft(const float x)
|
|
{
|
|
// Float version:
|
|
return tanh(1.202760580 * x);
|
|
}
|
|
|
|
inline float4 erf(const float4 x)
|
|
{
|
|
// Requires: x is the standard parameter to erf().
|
|
// Returns: Some approximation of erf(x), depending on user settings.
|
|
#ifdef ERF_FAST_APPROXIMATION
|
|
return erft(x);
|
|
#else
|
|
return erf6(x);
|
|
#endif
|
|
}
|
|
|
|
inline float3 erf(const float3 x)
|
|
{
|
|
// Float3 version:
|
|
#ifdef ERF_FAST_APPROXIMATION
|
|
return erft(x);
|
|
#else
|
|
return erf6(x);
|
|
#endif
|
|
}
|
|
|
|
inline float2 erf(const float2 x)
|
|
{
|
|
// Float2 version:
|
|
#ifdef ERF_FAST_APPROXIMATION
|
|
return erft(x);
|
|
#else
|
|
return erf6(x);
|
|
#endif
|
|
}
|
|
|
|
inline float erf(const float x)
|
|
{
|
|
// Float version:
|
|
#ifdef ERF_FAST_APPROXIMATION
|
|
return erft(x);
|
|
#else
|
|
return erf6(x);
|
|
#endif
|
|
}
|
|
|
|
|
|
/////////////////////////// COMPLETE GAMMA FUNCTION //////////////////////////
|
|
|
|
float4 gamma_impl(const float4 s, const float4 s_inv)
|
|
{
|
|
// Requires: 1.) s is the standard parameter to the gamma function, and
|
|
// it should lie in the [0, 36] range.
|
|
// 2.) s_inv = 1.0/s. This implementation function requires
|
|
// the caller to precompute this value, giving users the
|
|
// opportunity to reuse it.
|
|
// Returns: Return approximate gamma function (real-numbered factorial)
|
|
// output using the Lanczos approximation with two coefficients
|
|
// calculated using Paul Godfrey's method here:
|
|
// http://my.fit.edu/~gabdo/gamma.txt
|
|
// An optimal g value for s in [0, 36] is ~1.12906830989, with
|
|
// a maximum relative error of 0.000463 for 2**16 equally
|
|
// evals. We could use three coeffs (0.0000346 error) without
|
|
// hurting latency, but this allows more parallelism with
|
|
// outside instructions.
|
|
static const float4 g = float4(1.12906830989);
|
|
static const float4 c0 = float4(0.8109119309638332633713423362694399653724431);
|
|
static const float4 c1 = float4(0.4808354605142681877121661197951496120000040);
|
|
static const float4 e = float4(2.71828182845904523536028747135266249775724709);
|
|
const float4 sph = s + float4(0.5);
|
|
const float4 lanczos_sum = c0 + c1/(s + float4(1.0));
|
|
const float4 base = (sph + g)/e; // or (s + g + float4(0.5))/e
|
|
// gamma(s + 1) = base**sph * lanczos_sum; divide by s for gamma(s).
|
|
// This has less error for small s's than (s -= 1.0) at the beginning.
|
|
return (pow(base, sph) * lanczos_sum) * s_inv;
|
|
}
|
|
|
|
float3 gamma_impl(const float3 s, const float3 s_inv)
|
|
{
|
|
// Float3 version:
|
|
static const float3 g = float3(1.12906830989);
|
|
static const float3 c0 = float3(0.8109119309638332633713423362694399653724431);
|
|
static const float3 c1 = float3(0.4808354605142681877121661197951496120000040);
|
|
static const float3 e = float3(2.71828182845904523536028747135266249775724709);
|
|
const float3 sph = s + float3(0.5);
|
|
const float3 lanczos_sum = c0 + c1/(s + float3(1.0));
|
|
const float3 base = (sph + g)/e;
|
|
return (pow(base, sph) * lanczos_sum) * s_inv;
|
|
}
|
|
|
|
float2 gamma_impl(const float2 s, const float2 s_inv)
|
|
{
|
|
// Float2 version:
|
|
static const float2 g = float2(1.12906830989);
|
|
static const float2 c0 = float2(0.8109119309638332633713423362694399653724431);
|
|
static const float2 c1 = float2(0.4808354605142681877121661197951496120000040);
|
|
static const float2 e = float2(2.71828182845904523536028747135266249775724709);
|
|
const float2 sph = s + float2(0.5);
|
|
const float2 lanczos_sum = c0 + c1/(s + float2(1.0));
|
|
const float2 base = (sph + g)/e;
|
|
return (pow(base, sph) * lanczos_sum) * s_inv;
|
|
}
|
|
|
|
float gamma_impl(const float s, const float s_inv)
|
|
{
|
|
// Float version:
|
|
static const float g = 1.12906830989;
|
|
static const float c0 = 0.8109119309638332633713423362694399653724431;
|
|
static const float c1 = 0.4808354605142681877121661197951496120000040;
|
|
static const float e = 2.71828182845904523536028747135266249775724709;
|
|
const float sph = s + 0.5;
|
|
const float lanczos_sum = c0 + c1/(s + 1.0);
|
|
const float base = (sph + g)/e;
|
|
return (pow(base, sph) * lanczos_sum) * s_inv;
|
|
}
|
|
|
|
float4 gamma(const float4 s)
|
|
{
|
|
// Requires: s is the standard parameter to the gamma function, and it
|
|
// should lie in the [0, 36] range.
|
|
// Returns: Return approximate gamma function output with a maximum
|
|
// relative error of 0.000463. See gamma_impl for details.
|
|
return gamma_impl(s, float4(1.0)/s);
|
|
}
|
|
|
|
float3 gamma(const float3 s)
|
|
{
|
|
// Float3 version:
|
|
return gamma_impl(s, float3(1.0)/s);
|
|
}
|
|
|
|
float2 gamma(const float2 s)
|
|
{
|
|
// Float2 version:
|
|
return gamma_impl(s, float2(1.0)/s);
|
|
}
|
|
|
|
float gamma(const float s)
|
|
{
|
|
// Float version:
|
|
return gamma_impl(s, 1.0/s);
|
|
}
|
|
|
|
|
|
//////////////// INCOMPLETE GAMMA FUNCTIONS (RESTRICTED INPUT) ///////////////
|
|
|
|
// Lower incomplete gamma function for small s and z (implementation):
|
|
float4 ligamma_small_z_impl(const float4 s, const float4 z, const float4 s_inv)
|
|
{
|
|
// Requires: 1.) s < ~0.5
|
|
// 2.) z <= ~0.775075
|
|
// 3.) s_inv = 1.0/s (precomputed for outside reuse)
|
|
// Returns: A series representation for the lower incomplete gamma
|
|
// function for small s and small z (4 terms).
|
|
// The actual "rolled up" summation looks like:
|
|
// last_sign = 1.0; last_pow = 1.0; last_factorial = 1.0;
|
|
// sum = last_sign * last_pow / ((s + k) * last_factorial)
|
|
// for(int i = 0; i < 4; ++i)
|
|
// {
|
|
// last_sign *= -1.0; last_pow *= z; last_factorial *= i;
|
|
// sum += last_sign * last_pow / ((s + k) * last_factorial);
|
|
// }
|
|
// Unrolled, constant-unfolded and arranged for madds and parallelism:
|
|
const float4 scale = pow(z, s);
|
|
float4 sum = s_inv; // Summation iteration 0 result
|
|
// Summation iterations 1, 2, and 3:
|
|
const float4 z_sq = z*z;
|
|
const float4 denom1 = s + float4(1.0);
|
|
const float4 denom2 = 2.0*s + float4(4.0);
|
|
const float4 denom3 = 6.0*s + float4(18.0);
|
|
//float4 denom4 = 24.0*s + float4(96.0);
|
|
sum -= z/denom1;
|
|
sum += z_sq/denom2;
|
|
sum -= z * z_sq/denom3;
|
|
//sum += z_sq * z_sq / denom4;
|
|
// Scale and return:
|
|
return scale * sum;
|
|
}
|
|
|
|
float3 ligamma_small_z_impl(const float3 s, const float3 z, const float3 s_inv)
|
|
{
|
|
// Float3 version:
|
|
const float3 scale = pow(z, s);
|
|
float3 sum = s_inv;
|
|
const float3 z_sq = z*z;
|
|
const float3 denom1 = s + float3(1.0);
|
|
const float3 denom2 = 2.0*s + float3(4.0);
|
|
const float3 denom3 = 6.0*s + float3(18.0);
|
|
sum -= z/denom1;
|
|
sum += z_sq/denom2;
|
|
sum -= z * z_sq/denom3;
|
|
return scale * sum;
|
|
}
|
|
|
|
float2 ligamma_small_z_impl(const float2 s, const float2 z, const float2 s_inv)
|
|
{
|
|
// Float2 version:
|
|
const float2 scale = pow(z, s);
|
|
float2 sum = s_inv;
|
|
const float2 z_sq = z*z;
|
|
const float2 denom1 = s + float2(1.0);
|
|
const float2 denom2 = 2.0*s + float2(4.0);
|
|
const float2 denom3 = 6.0*s + float2(18.0);
|
|
sum -= z/denom1;
|
|
sum += z_sq/denom2;
|
|
sum -= z * z_sq/denom3;
|
|
return scale * sum;
|
|
}
|
|
|
|
float ligamma_small_z_impl(const float s, const float z, const float s_inv)
|
|
{
|
|
// Float version:
|
|
const float scale = pow(z, s);
|
|
float sum = s_inv;
|
|
const float z_sq = z*z;
|
|
const float denom1 = s + 1.0;
|
|
const float denom2 = 2.0*s + 4.0;
|
|
const float denom3 = 6.0*s + 18.0;
|
|
sum -= z/denom1;
|
|
sum += z_sq/denom2;
|
|
sum -= z * z_sq/denom3;
|
|
return scale * sum;
|
|
}
|
|
|
|
// Upper incomplete gamma function for small s and large z (implementation):
|
|
float4 uigamma_large_z_impl(const float4 s, const float4 z)
|
|
{
|
|
// Requires: 1.) s < ~0.5
|
|
// 2.) z > ~0.775075
|
|
// Returns: Gauss's continued fraction representation for the upper
|
|
// incomplete gamma function (4 terms).
|
|
// The "rolled up" continued fraction looks like this. The denominator
|
|
// is truncated, and it's calculated "from the bottom up:"
|
|
// denom = float4('inf');
|
|
// float4 one = float4(1.0);
|
|
// for(int i = 4; i > 0; --i)
|
|
// {
|
|
// denom = ((i * 2.0) - one) + z - s + (i * (s - i))/denom;
|
|
// }
|
|
// Unrolled and constant-unfolded for madds and parallelism:
|
|
const float4 numerator = pow(z, s) * exp(-z);
|
|
float4 denom = float4(7.0) + z - s;
|
|
denom = float4(5.0) + z - s + (3.0*s - float4(9.0))/denom;
|
|
denom = float4(3.0) + z - s + (2.0*s - float4(4.0))/denom;
|
|
denom = float4(1.0) + z - s + (s - float4(1.0))/denom;
|
|
return numerator / denom;
|
|
}
|
|
|
|
float3 uigamma_large_z_impl(const float3 s, const float3 z)
|
|
{
|
|
// Float3 version:
|
|
const float3 numerator = pow(z, s) * exp(-z);
|
|
float3 denom = float3(7.0) + z - s;
|
|
denom = float3(5.0) + z - s + (3.0*s - float3(9.0))/denom;
|
|
denom = float3(3.0) + z - s + (2.0*s - float3(4.0))/denom;
|
|
denom = float3(1.0) + z - s + (s - float3(1.0))/denom;
|
|
return numerator / denom;
|
|
}
|
|
|
|
float2 uigamma_large_z_impl(const float2 s, const float2 z)
|
|
{
|
|
// Float2 version:
|
|
const float2 numerator = pow(z, s) * exp(-z);
|
|
float2 denom = float2(7.0) + z - s;
|
|
denom = float2(5.0) + z - s + (3.0*s - float2(9.0))/denom;
|
|
denom = float2(3.0) + z - s + (2.0*s - float2(4.0))/denom;
|
|
denom = float2(1.0) + z - s + (s - float2(1.0))/denom;
|
|
return numerator / denom;
|
|
}
|
|
|
|
float uigamma_large_z_impl(const float s, const float z)
|
|
{
|
|
// Float version:
|
|
const float numerator = pow(z, s) * exp(-z);
|
|
float denom = 7.0 + z - s;
|
|
denom = 5.0 + z - s + (3.0*s - 9.0)/denom;
|
|
denom = 3.0 + z - s + (2.0*s - 4.0)/denom;
|
|
denom = 1.0 + z - s + (s - 1.0)/denom;
|
|
return numerator / denom;
|
|
}
|
|
|
|
// Normalized lower incomplete gamma function for small s (implementation):
|
|
float4 normalized_ligamma_impl(const float4 s, const float4 z,
|
|
const float4 s_inv, const float4 gamma_s_inv)
|
|
{
|
|
// Requires: 1.) s < ~0.5
|
|
// 2.) s_inv = 1/s (precomputed for outside reuse)
|
|
// 3.) gamma_s_inv = 1/gamma(s) (precomputed for outside reuse)
|
|
// Returns: Approximate the normalized lower incomplete gamma function
|
|
// for s < 0.5. Since we only care about s < 0.5, we only need
|
|
// to evaluate two branches (not four) based on z. Each branch
|
|
// uses four terms, with a max relative error of ~0.00182. The
|
|
// branch threshold and specifics were adapted for fewer terms
|
|
// from Gil/Segura/Temme's paper here:
|
|
// http://oai.cwi.nl/oai/asset/20433/20433B.pdf
|
|
// Evaluate both branches: Real branches test slower even when available.
|
|
static const float4 thresh = float4(0.775075);
|
|
bool4 z_is_large;
|
|
z_is_large.x = z.x > thresh.x;
|
|
z_is_large.y = z.y > thresh.y;
|
|
z_is_large.z = z.z > thresh.z;
|
|
z_is_large.w = z.w > thresh.w;
|
|
const float4 large_z = float4(1.0) - uigamma_large_z_impl(s, z) * gamma_s_inv;
|
|
const float4 small_z = ligamma_small_z_impl(s, z, s_inv) * gamma_s_inv;
|
|
// Combine the results from both branches:
|
|
bool4 inverse_z_is_large = not(z_is_large);
|
|
return large_z * float4(z_is_large) + small_z * float4(inverse_z_is_large);
|
|
}
|
|
|
|
float3 normalized_ligamma_impl(const float3 s, const float3 z,
|
|
const float3 s_inv, const float3 gamma_s_inv)
|
|
{
|
|
// Float3 version:
|
|
static const float3 thresh = float3(0.775075);
|
|
bool3 z_is_large;
|
|
z_is_large.x = z.x > thresh.x;
|
|
z_is_large.y = z.y > thresh.y;
|
|
z_is_large.z = z.z > thresh.z;
|
|
const float3 large_z = float3(1.0) - uigamma_large_z_impl(s, z) * gamma_s_inv;
|
|
const float3 small_z = ligamma_small_z_impl(s, z, s_inv) * gamma_s_inv;
|
|
bool3 inverse_z_is_large = not(z_is_large);
|
|
return large_z * float3(z_is_large) + small_z * float3(inverse_z_is_large);
|
|
}
|
|
|
|
float2 normalized_ligamma_impl(const float2 s, const float2 z,
|
|
const float2 s_inv, const float2 gamma_s_inv)
|
|
{
|
|
// Float2 version:
|
|
static const float2 thresh = float2(0.775075);
|
|
bool2 z_is_large;
|
|
z_is_large.x = z.x > thresh.x;
|
|
z_is_large.y = z.y > thresh.y;
|
|
const float2 large_z = float2(1.0) - uigamma_large_z_impl(s, z) * gamma_s_inv;
|
|
const float2 small_z = ligamma_small_z_impl(s, z, s_inv) * gamma_s_inv;
|
|
bool2 inverse_z_is_large = not(z_is_large);
|
|
return large_z * float2(z_is_large) + small_z * float2(inverse_z_is_large);
|
|
}
|
|
|
|
float normalized_ligamma_impl(const float s, const float z,
|
|
const float s_inv, const float gamma_s_inv)
|
|
{
|
|
// Float version:
|
|
static const float thresh = 0.775075;
|
|
const bool z_is_large = z > thresh;
|
|
const float large_z = 1.0 - uigamma_large_z_impl(s, z) * gamma_s_inv;
|
|
const float small_z = ligamma_small_z_impl(s, z, s_inv) * gamma_s_inv;
|
|
return large_z * float(z_is_large) + small_z * float(!z_is_large);
|
|
}
|
|
|
|
// Normalized lower incomplete gamma function for small s:
|
|
float4 normalized_ligamma(const float4 s, const float4 z)
|
|
{
|
|
// Requires: s < ~0.5
|
|
// Returns: Approximate the normalized lower incomplete gamma function
|
|
// for s < 0.5. See normalized_ligamma_impl() for details.
|
|
const float4 s_inv = float4(1.0)/s;
|
|
const float4 gamma_s_inv = float4(1.0)/gamma_impl(s, s_inv);
|
|
return normalized_ligamma_impl(s, z, s_inv, gamma_s_inv);
|
|
}
|
|
|
|
float3 normalized_ligamma(const float3 s, const float3 z)
|
|
{
|
|
// Float3 version:
|
|
const float3 s_inv = float3(1.0)/s;
|
|
const float3 gamma_s_inv = float3(1.0)/gamma_impl(s, s_inv);
|
|
return normalized_ligamma_impl(s, z, s_inv, gamma_s_inv);
|
|
}
|
|
|
|
float2 normalized_ligamma(const float2 s, const float2 z)
|
|
{
|
|
// Float2 version:
|
|
const float2 s_inv = float2(1.0)/s;
|
|
const float2 gamma_s_inv = float2(1.0)/gamma_impl(s, s_inv);
|
|
return normalized_ligamma_impl(s, z, s_inv, gamma_s_inv);
|
|
}
|
|
|
|
float normalized_ligamma(const float s, const float z)
|
|
{
|
|
// Float version:
|
|
const float s_inv = 1.0/s;
|
|
const float gamma_s_inv = 1.0/gamma_impl(s, s_inv);
|
|
return normalized_ligamma_impl(s, z, s_inv, gamma_s_inv);
|
|
}
|
|
|
|
#endif // SPECIAL_FUNCTIONS_H
|
|
|
|
//////////////////////////// END SPECIAL-FUNCTIONS ///////////////////////////
|
|
|
|
//#include "../../../../include/gamma-management.h"
|
|
|
|
//////////////////////////// BEGIN GAMMA-MANAGEMENT //////////////////////////
|
|
|
|
#ifndef GAMMA_MANAGEMENT_H
|
|
#define GAMMA_MANAGEMENT_H
|
|
|
|
///////////////////////////////// MIT LICENSE ////////////////////////////////
|
|
|
|
// Copyright (C) 2014 TroggleMonkey
|
|
//
|
|
// Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
// of this software and associated documentation files (the "Software"), to
|
|
// deal in the Software without restriction, including without limitation the
|
|
// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
|
|
// sell copies of the Software, and to permit persons to whom the Software is
|
|
// furnished to do so, subject to the following conditions:
|
|
//
|
|
// The above copyright notice and this permission notice shall be included in
|
|
// all copies or substantial portions of the Software.
|
|
//
|
|
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
|
|
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
|
|
// IN THE SOFTWARE.
|
|
|
|
///////////////////////////////// DESCRIPTION ////////////////////////////////
|
|
|
|
// This file provides gamma-aware tex*D*() and encode_output() functions.
|
|
// Requires: Before #include-ing this file, the including file must #define
|
|
// the following macros when applicable and follow their rules:
|
|
// 1.) #define FIRST_PASS if this is the first pass.
|
|
// 2.) #define LAST_PASS if this is the last pass.
|
|
// 3.) If sRGB is available, set srgb_framebufferN = "true" for
|
|
// every pass except the last in your .cgp preset.
|
|
// 4.) If sRGB isn't available but you want gamma-correctness with
|
|
// no banding, #define GAMMA_ENCODE_EVERY_FBO each pass.
|
|
// 5.) #define SIMULATE_CRT_ON_LCD if desired (precedence over 5-7)
|
|
// 6.) #define SIMULATE_GBA_ON_LCD if desired (precedence over 6-7)
|
|
// 7.) #define SIMULATE_LCD_ON_CRT if desired (precedence over 7)
|
|
// 8.) #define SIMULATE_GBA_ON_CRT if desired (precedence over -)
|
|
// If an option in [5, 8] is #defined in the first or last pass, it
|
|
// should be #defined for both. It shouldn't make a difference
|
|
// whether it's #defined for intermediate passes or not.
|
|
// Optional: The including file (or an earlier included file) may optionally
|
|
// #define a number of macros indicating it will override certain
|
|
// macros and associated constants are as follows:
|
|
// static constants with either static or uniform constants. The
|
|
// 1.) OVERRIDE_STANDARD_GAMMA: The user must first define:
|
|
// static const float ntsc_gamma
|
|
// static const float pal_gamma
|
|
// static const float crt_reference_gamma_high
|
|
// static const float crt_reference_gamma_low
|
|
// static const float lcd_reference_gamma
|
|
// static const float crt_office_gamma
|
|
// static const float lcd_office_gamma
|
|
// 2.) OVERRIDE_DEVICE_GAMMA: The user must first define:
|
|
// static const float crt_gamma
|
|
// static const float gba_gamma
|
|
// static const float lcd_gamma
|
|
// 3.) OVERRIDE_FINAL_GAMMA: The user must first define:
|
|
// static const float input_gamma
|
|
// static const float intermediate_gamma
|
|
// static const float output_gamma
|
|
// (intermediate_gamma is for GAMMA_ENCODE_EVERY_FBO.)
|
|
// 4.) OVERRIDE_ALPHA_ASSUMPTIONS: The user must first define:
|
|
// static const bool assume_opaque_alpha
|
|
// The gamma constant overrides must be used in every pass or none,
|
|
// and OVERRIDE_FINAL_GAMMA bypasses all of the SIMULATE* macros.
|
|
// OVERRIDE_ALPHA_ASSUMPTIONS may be set on a per-pass basis.
|
|
// Usage: After setting macros appropriately, ignore gamma correction and
|
|
// replace all tex*D*() calls with equivalent gamma-aware
|
|
// tex*D*_linearize calls, except:
|
|
// 1.) When you read an LUT, use regular tex*D or a gamma-specified
|
|
// function, depending on its gamma encoding:
|
|
// tex*D*_linearize_gamma (takes a runtime gamma parameter)
|
|
// 2.) If you must read pass0's original input in a later pass, use
|
|
// tex2D_linearize_ntsc_gamma. If you want to read pass0's
|
|
// input with gamma-corrected bilinear filtering, consider
|
|
// creating a first linearizing pass and reading from the input
|
|
// of pass1 later.
|
|
// Then, return encode_output(color) from every fragment shader.
|
|
// Finally, use the global gamma_aware_bilinear boolean if you want
|
|
// to statically branch based on whether bilinear filtering is
|
|
// gamma-correct or not (e.g. for placing Gaussian blur samples).
|
|
//
|
|
// Detailed Policy:
|
|
// tex*D*_linearize() functions enforce a consistent gamma-management policy
|
|
// based on the FIRST_PASS and GAMMA_ENCODE_EVERY_FBO settings. They assume
|
|
// their input texture has the same encoding characteristics as the input for
|
|
// the current pass (which doesn't apply to the exceptions listed above).
|
|
// Similarly, encode_output() enforces a policy based on the LAST_PASS and
|
|
// GAMMA_ENCODE_EVERY_FBO settings. Together, they result in one of the
|
|
// following two pipelines.
|
|
// Typical pipeline with intermediate sRGB framebuffers:
|
|
// linear_color = pow(pass0_encoded_color, input_gamma);
|
|
// intermediate_output = linear_color; // Automatic sRGB encoding
|
|
// linear_color = intermediate_output; // Automatic sRGB decoding
|
|
// final_output = pow(intermediate_output, 1.0/output_gamma);
|
|
// Typical pipeline without intermediate sRGB framebuffers:
|
|
// linear_color = pow(pass0_encoded_color, input_gamma);
|
|
// intermediate_output = pow(linear_color, 1.0/intermediate_gamma);
|
|
// linear_color = pow(intermediate_output, intermediate_gamma);
|
|
// final_output = pow(intermediate_output, 1.0/output_gamma);
|
|
// Using GAMMA_ENCODE_EVERY_FBO is much slower, but it's provided as a way to
|
|
// easily get gamma-correctness without banding on devices where sRGB isn't
|
|
// supported.
|
|
//
|
|
// Use This Header to Maximize Code Reuse:
|
|
// The purpose of this header is to provide a consistent interface for texture
|
|
// reads and output gamma-encoding that localizes and abstracts away all the
|
|
// annoying details. This greatly reduces the amount of code in each shader
|
|
// pass that depends on the pass number in the .cgp preset or whether sRGB
|
|
// FBO's are being used: You can trivially change the gamma behavior of your
|
|
// whole pass by commenting or uncommenting 1-3 #defines. To reuse the same
|
|
// code in your first, Nth, and last passes, you can even put it all in another
|
|
// header file and #include it from skeleton .cg files that #define the
|
|
// appropriate pass-specific settings.
|
|
//
|
|
// Rationale for Using Three Macros:
|
|
// This file uses GAMMA_ENCODE_EVERY_FBO instead of an opposite macro like
|
|
// SRGB_PIPELINE to ensure sRGB is assumed by default, which hopefully imposes
|
|
// a lower maintenance burden on each pass. At first glance it seems we could
|
|
// accomplish everything with two macros: GAMMA_CORRECT_IN / GAMMA_CORRECT_OUT.
|
|
// This works for simple use cases where input_gamma == output_gamma, but it
|
|
// breaks down for more complex scenarios like CRT simulation, where the pass
|
|
// number determines the gamma encoding of the input and output.
|
|
|
|
|
|
/////////////////////////////// BASE CONSTANTS ///////////////////////////////
|
|
|
|
// Set standard gamma constants, but allow users to override them:
|
|
#ifndef OVERRIDE_STANDARD_GAMMA
|
|
// Standard encoding gammas:
|
|
static const float ntsc_gamma = 2.2; // Best to use NTSC for PAL too?
|
|
static const float pal_gamma = 2.8; // Never actually 2.8 in practice
|
|
// Typical device decoding gammas (only use for emulating devices):
|
|
// CRT/LCD reference gammas are higher than NTSC and Rec.709 video standard
|
|
// gammas: The standards purposely undercorrected for an analog CRT's
|
|
// assumed 2.5 reference display gamma to maintain contrast in assumed
|
|
// [dark] viewing conditions: http://www.poynton.com/PDFs/GammaFAQ.pdf
|
|
// These unstated assumptions about display gamma and perceptual rendering
|
|
// intent caused a lot of confusion, and more modern CRT's seemed to target
|
|
// NTSC 2.2 gamma with circuitry. LCD displays seem to have followed suit
|
|
// (they struggle near black with 2.5 gamma anyway), especially PC/laptop
|
|
// displays designed to view sRGB in bright environments. (Standards are
|
|
// also in flux again with BT.1886, but it's underspecified for displays.)
|
|
static const float crt_reference_gamma_high = 2.5; // In (2.35, 2.55)
|
|
static const float crt_reference_gamma_low = 2.35; // In (2.35, 2.55)
|
|
static const float lcd_reference_gamma = 2.5; // To match CRT
|
|
static const float crt_office_gamma = 2.2; // Circuitry-adjusted for NTSC
|
|
static const float lcd_office_gamma = 2.2; // Approximates sRGB
|
|
#endif // OVERRIDE_STANDARD_GAMMA
|
|
|
|
// Assuming alpha == 1.0 might make it easier for users to avoid some bugs,
|
|
// but only if they're aware of it.
|
|
#ifndef OVERRIDE_ALPHA_ASSUMPTIONS
|
|
static const bool assume_opaque_alpha = false;
|
|
#endif
|
|
|
|
|
|
/////////////////////// DERIVED CONSTANTS AS FUNCTIONS ///////////////////////
|
|
|
|
// gamma-management.h should be compatible with overriding gamma values with
|
|
// runtime user parameters, but we can only define other global constants in
|
|
// terms of static constants, not uniform user parameters. To get around this
|
|
// limitation, we need to define derived constants using functions.
|
|
|
|
// Set device gamma constants, but allow users to override them:
|
|
#ifdef OVERRIDE_DEVICE_GAMMA
|
|
// The user promises to globally define the appropriate constants:
|
|
inline float get_crt_gamma() { return crt_gamma; }
|
|
inline float get_gba_gamma() { return gba_gamma; }
|
|
inline float get_lcd_gamma() { return lcd_gamma; }
|
|
#else
|
|
inline float get_crt_gamma() { return crt_reference_gamma_high; }
|
|
inline float get_gba_gamma() { return 3.5; } // Game Boy Advance; in (3.0, 4.0)
|
|
inline float get_lcd_gamma() { return lcd_office_gamma; }
|
|
#endif // OVERRIDE_DEVICE_GAMMA
|
|
|
|
// Set decoding/encoding gammas for the first/lass passes, but allow overrides:
|
|
#ifdef OVERRIDE_FINAL_GAMMA
|
|
// The user promises to globally define the appropriate constants:
|
|
inline float get_intermediate_gamma() { return intermediate_gamma; }
|
|
inline float get_input_gamma() { return input_gamma; }
|
|
inline float get_output_gamma() { return output_gamma; }
|
|
#else
|
|
// If we gamma-correct every pass, always use ntsc_gamma between passes to
|
|
// ensure middle passes don't need to care if anything is being simulated:
|
|
inline float get_intermediate_gamma() { return ntsc_gamma; }
|
|
#ifdef SIMULATE_CRT_ON_LCD
|
|
inline float get_input_gamma() { return get_crt_gamma(); }
|
|
inline float get_output_gamma() { return get_lcd_gamma(); }
|
|
#else
|
|
#ifdef SIMULATE_GBA_ON_LCD
|
|
inline float get_input_gamma() { return get_gba_gamma(); }
|
|
inline float get_output_gamma() { return get_lcd_gamma(); }
|
|
#else
|
|
#ifdef SIMULATE_LCD_ON_CRT
|
|
inline float get_input_gamma() { return get_lcd_gamma(); }
|
|
inline float get_output_gamma() { return get_crt_gamma(); }
|
|
#else
|
|
#ifdef SIMULATE_GBA_ON_CRT
|
|
inline float get_input_gamma() { return get_gba_gamma(); }
|
|
inline float get_output_gamma() { return get_crt_gamma(); }
|
|
#else // Don't simulate anything:
|
|
inline float get_input_gamma() { return ntsc_gamma; }
|
|
inline float get_output_gamma() { return ntsc_gamma; }
|
|
#endif // SIMULATE_GBA_ON_CRT
|
|
#endif // SIMULATE_LCD_ON_CRT
|
|
#endif // SIMULATE_GBA_ON_LCD
|
|
#endif // SIMULATE_CRT_ON_LCD
|
|
#endif // OVERRIDE_FINAL_GAMMA
|
|
|
|
// Set decoding/encoding gammas for the current pass. Use static constants for
|
|
// linearize_input and gamma_encode_output, because they aren't derived, and
|
|
// they let the compiler do dead-code elimination.
|
|
#ifndef GAMMA_ENCODE_EVERY_FBO
|
|
#ifdef FIRST_PASS
|
|
static const bool linearize_input = true;
|
|
inline float get_pass_input_gamma() { return get_input_gamma(); }
|
|
#else
|
|
static const bool linearize_input = false;
|
|
inline float get_pass_input_gamma() { return 1.0; }
|
|
#endif
|
|
#ifdef LAST_PASS
|
|
static const bool gamma_encode_output = true;
|
|
inline float get_pass_output_gamma() { return get_output_gamma(); }
|
|
#else
|
|
static const bool gamma_encode_output = false;
|
|
inline float get_pass_output_gamma() { return 1.0; }
|
|
#endif
|
|
#else
|
|
static const bool linearize_input = true;
|
|
static const bool gamma_encode_output = true;
|
|
#ifdef FIRST_PASS
|
|
inline float get_pass_input_gamma() { return get_input_gamma(); }
|
|
#else
|
|
inline float get_pass_input_gamma() { return get_intermediate_gamma(); }
|
|
#endif
|
|
#ifdef LAST_PASS
|
|
inline float get_pass_output_gamma() { return get_output_gamma(); }
|
|
#else
|
|
inline float get_pass_output_gamma() { return get_intermediate_gamma(); }
|
|
#endif
|
|
#endif
|
|
|
|
// Users might want to know if bilinear filtering will be gamma-correct:
|
|
static const bool gamma_aware_bilinear = !linearize_input;
|
|
|
|
|
|
////////////////////// COLOR ENCODING/DECODING FUNCTIONS /////////////////////
|
|
|
|
inline float4 encode_output(const float4 color)
|
|
{
|
|
if(gamma_encode_output)
|
|
{
|
|
if(assume_opaque_alpha)
|
|
{
|
|
return float4(pow(color.rgb, float3(1.0/get_pass_output_gamma())), 1.0);
|
|
}
|
|
else
|
|
{
|
|
return float4(pow(color.rgb, float3(1.0/get_pass_output_gamma())), color.a);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
return color;
|
|
}
|
|
}
|
|
|
|
inline float4 decode_input(const float4 color)
|
|
{
|
|
if(linearize_input)
|
|
{
|
|
if(assume_opaque_alpha)
|
|
{
|
|
return float4(pow(color.rgb, float3(get_pass_input_gamma())), 1.0);
|
|
}
|
|
else
|
|
{
|
|
return float4(pow(color.rgb, float3(get_pass_input_gamma())), color.a);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
return color;
|
|
}
|
|
}
|
|
|
|
inline float4 decode_gamma_input(const float4 color, const float3 gamma)
|
|
{
|
|
if(assume_opaque_alpha)
|
|
{
|
|
return float4(pow(color.rgb, gamma), 1.0);
|
|
}
|
|
else
|
|
{
|
|
return float4(pow(color.rgb, gamma), color.a);
|
|
}
|
|
}
|
|
|
|
//TODO/FIXME: I have no idea why replacing the lookup wrappers with this macro fixes the blurs being offset ¯\_(ツ)_/¯
|
|
//#define tex2D_linearize(C, D) decode_input(vec4(texture(C, D)))
|
|
// EDIT: it's the 'const' in front of the coords that's doing it
|
|
|
|
/////////////////////////// TEXTURE LOOKUP WRAPPERS //////////////////////////
|
|
|
|
// "SMART" LINEARIZING TEXTURE LOOKUP FUNCTIONS:
|
|
// Provide a wide array of linearizing texture lookup wrapper functions. The
|
|
// Cg shader spec Retroarch uses only allows for 2D textures, but 1D and 3D
|
|
// lookups are provided for completeness in case that changes someday. Nobody
|
|
// is likely to use the *fetch and *proj functions, but they're included just
|
|
// in case. The only tex*D texture sampling functions omitted are:
|
|
// - tex*Dcmpbias
|
|
// - tex*Dcmplod
|
|
// - tex*DARRAY*
|
|
// - tex*DMS*
|
|
// - Variants returning integers
|
|
// Standard line length restrictions are ignored below for vertical brevity.
|
|
/*
|
|
// tex1D:
|
|
inline float4 tex1D_linearize(const sampler1D tex, const float tex_coords)
|
|
{ return decode_input(tex1D(tex, tex_coords)); }
|
|
|
|
inline float4 tex1D_linearize(const sampler1D tex, const float2 tex_coords)
|
|
{ return decode_input(tex1D(tex, tex_coords)); }
|
|
|
|
inline float4 tex1D_linearize(const sampler1D tex, const float tex_coords, const int texel_off)
|
|
{ return decode_input(tex1D(tex, tex_coords, texel_off)); }
|
|
|
|
inline float4 tex1D_linearize(const sampler1D tex, const float2 tex_coords, const int texel_off)
|
|
{ return decode_input(tex1D(tex, tex_coords, texel_off)); }
|
|
|
|
inline float4 tex1D_linearize(const sampler1D tex, const float tex_coords, const float dx, const float dy)
|
|
{ return decode_input(tex1D(tex, tex_coords, dx, dy)); }
|
|
|
|
inline float4 tex1D_linearize(const sampler1D tex, const float2 tex_coords, const float dx, const float dy)
|
|
{ return decode_input(tex1D(tex, tex_coords, dx, dy)); }
|
|
|
|
inline float4 tex1D_linearize(const sampler1D tex, const float tex_coords, const float dx, const float dy, const int texel_off)
|
|
{ return decode_input(tex1D(tex, tex_coords, dx, dy, texel_off)); }
|
|
|
|
inline float4 tex1D_linearize(const sampler1D tex, const float2 tex_coords, const float dx, const float dy, const int texel_off)
|
|
{ return decode_input(tex1D(tex, tex_coords, dx, dy, texel_off)); }
|
|
|
|
// tex1Dbias:
|
|
inline float4 tex1Dbias_linearize(const sampler1D tex, const float4 tex_coords)
|
|
{ return decode_input(tex1Dbias(tex, tex_coords)); }
|
|
|
|
inline float4 tex1Dbias_linearize(const sampler1D tex, const float4 tex_coords, const int texel_off)
|
|
{ return decode_input(tex1Dbias(tex, tex_coords, texel_off)); }
|
|
|
|
// tex1Dfetch:
|
|
inline float4 tex1Dfetch_linearize(const sampler1D tex, const int4 tex_coords)
|
|
{ return decode_input(tex1Dfetch(tex, tex_coords)); }
|
|
|
|
inline float4 tex1Dfetch_linearize(const sampler1D tex, const int4 tex_coords, const int texel_off)
|
|
{ return decode_input(tex1Dfetch(tex, tex_coords, texel_off)); }
|
|
|
|
// tex1Dlod:
|
|
inline float4 tex1Dlod_linearize(const sampler1D tex, const float4 tex_coords)
|
|
{ return decode_input(tex1Dlod(tex, tex_coords)); }
|
|
|
|
inline float4 tex1Dlod_linearize(const sampler1D tex, const float4 tex_coords, const int texel_off)
|
|
{ return decode_input(tex1Dlod(tex, tex_coords, texel_off)); }
|
|
|
|
// tex1Dproj:
|
|
inline float4 tex1Dproj_linearize(const sampler1D tex, const float2 tex_coords)
|
|
{ return decode_input(tex1Dproj(tex, tex_coords)); }
|
|
|
|
inline float4 tex1Dproj_linearize(const sampler1D tex, const float3 tex_coords)
|
|
{ return decode_input(tex1Dproj(tex, tex_coords)); }
|
|
|
|
inline float4 tex1Dproj_linearize(const sampler1D tex, const float2 tex_coords, const int texel_off)
|
|
{ return decode_input(tex1Dproj(tex, tex_coords, texel_off)); }
|
|
|
|
inline float4 tex1Dproj_linearize(const sampler1D tex, const float3 tex_coords, const int texel_off)
|
|
{ return decode_input(tex1Dproj(tex, tex_coords, texel_off)); }
|
|
*/
|
|
// tex2D:
|
|
inline float4 tex2D_linearize(const sampler2D tex, float2 tex_coords)
|
|
{ return decode_input(COMPAT_TEXTURE(tex, tex_coords)); }
|
|
|
|
inline float4 tex2D_linearize(const sampler2D tex, float3 tex_coords)
|
|
{ return decode_input(COMPAT_TEXTURE(tex, tex_coords.xy)); }
|
|
|
|
inline float4 tex2D_linearize(const sampler2D tex, float2 tex_coords, int texel_off)
|
|
{ return decode_input(textureLod(tex, tex_coords, texel_off)); }
|
|
|
|
inline float4 tex2D_linearize(const sampler2D tex, float3 tex_coords, int texel_off)
|
|
{ return decode_input(textureLod(tex, tex_coords.xy, texel_off)); }
|
|
|
|
//inline float4 tex2D_linearize(const sampler2D tex, const float2 tex_coords, const float2 dx, const float2 dy)
|
|
//{ return decode_input(COMPAT_TEXTURE(tex, tex_coords, dx, dy)); }
|
|
|
|
//inline float4 tex2D_linearize(const sampler2D tex, const float3 tex_coords, const float2 dx, const float2 dy)
|
|
//{ return decode_input(COMPAT_TEXTURE(tex, tex_coords, dx, dy)); }
|
|
|
|
//inline float4 tex2D_linearize(const sampler2D tex, const float2 tex_coords, const float2 dx, const float2 dy, const int texel_off)
|
|
//{ return decode_input(COMPAT_TEXTURE(tex, tex_coords, dx, dy, texel_off)); }
|
|
|
|
//inline float4 tex2D_linearize(const sampler2D tex, const float3 tex_coords, const float2 dx, const float2 dy, const int texel_off)
|
|
//{ return decode_input(COMPAT_TEXTURE(tex, tex_coords, dx, dy, texel_off)); }
|
|
|
|
// tex2Dbias:
|
|
//inline float4 tex2Dbias_linearize(const sampler2D tex, const float4 tex_coords)
|
|
//{ return decode_input(tex2Dbias(tex, tex_coords)); }
|
|
|
|
//inline float4 tex2Dbias_linearize(const sampler2D tex, const float4 tex_coords, const int texel_off)
|
|
//{ return decode_input(tex2Dbias(tex, tex_coords, texel_off)); }
|
|
|
|
// tex2Dfetch:
|
|
//inline float4 tex2Dfetch_linearize(const sampler2D tex, const int4 tex_coords)
|
|
//{ return decode_input(tex2Dfetch(tex, tex_coords)); }
|
|
|
|
//inline float4 tex2Dfetch_linearize(const sampler2D tex, const int4 tex_coords, const int texel_off)
|
|
//{ return decode_input(tex2Dfetch(tex, tex_coords, texel_off)); }
|
|
|
|
// tex2Dlod:
|
|
inline float4 tex2Dlod_linearize(const sampler2D tex, float4 tex_coords)
|
|
{ return decode_input(textureLod(tex, tex_coords.xy, 0.0)); }
|
|
|
|
inline float4 tex2Dlod_linearize(const sampler2D tex, float4 tex_coords, int texel_off)
|
|
{ return decode_input(textureLod(tex, tex_coords.xy, texel_off)); }
|
|
/*
|
|
// tex2Dproj:
|
|
inline float4 tex2Dproj_linearize(const sampler2D tex, const float3 tex_coords)
|
|
{ return decode_input(tex2Dproj(tex, tex_coords)); }
|
|
|
|
inline float4 tex2Dproj_linearize(const sampler2D tex, const float4 tex_coords)
|
|
{ return decode_input(tex2Dproj(tex, tex_coords)); }
|
|
|
|
inline float4 tex2Dproj_linearize(const sampler2D tex, const float3 tex_coords, const int texel_off)
|
|
{ return decode_input(tex2Dproj(tex, tex_coords, texel_off)); }
|
|
|
|
inline float4 tex2Dproj_linearize(const sampler2D tex, const float4 tex_coords, const int texel_off)
|
|
{ return decode_input(tex2Dproj(tex, tex_coords, texel_off)); }
|
|
*/
|
|
/*
|
|
// tex3D:
|
|
inline float4 tex3D_linearize(const sampler3D tex, const float3 tex_coords)
|
|
{ return decode_input(tex3D(tex, tex_coords)); }
|
|
|
|
inline float4 tex3D_linearize(const sampler3D tex, const float3 tex_coords, const int texel_off)
|
|
{ return decode_input(tex3D(tex, tex_coords, texel_off)); }
|
|
|
|
inline float4 tex3D_linearize(const sampler3D tex, const float3 tex_coords, const float3 dx, const float3 dy)
|
|
{ return decode_input(tex3D(tex, tex_coords, dx, dy)); }
|
|
|
|
inline float4 tex3D_linearize(const sampler3D tex, const float3 tex_coords, const float3 dx, const float3 dy, const int texel_off)
|
|
{ return decode_input(tex3D(tex, tex_coords, dx, dy, texel_off)); }
|
|
|
|
// tex3Dbias:
|
|
inline float4 tex3Dbias_linearize(const sampler3D tex, const float4 tex_coords)
|
|
{ return decode_input(tex3Dbias(tex, tex_coords)); }
|
|
|
|
inline float4 tex3Dbias_linearize(const sampler3D tex, const float4 tex_coords, const int texel_off)
|
|
{ return decode_input(tex3Dbias(tex, tex_coords, texel_off)); }
|
|
|
|
// tex3Dfetch:
|
|
inline float4 tex3Dfetch_linearize(const sampler3D tex, const int4 tex_coords)
|
|
{ return decode_input(tex3Dfetch(tex, tex_coords)); }
|
|
|
|
inline float4 tex3Dfetch_linearize(const sampler3D tex, const int4 tex_coords, const int texel_off)
|
|
{ return decode_input(tex3Dfetch(tex, tex_coords, texel_off)); }
|
|
|
|
// tex3Dlod:
|
|
inline float4 tex3Dlod_linearize(const sampler3D tex, const float4 tex_coords)
|
|
{ return decode_input(tex3Dlod(tex, tex_coords)); }
|
|
|
|
inline float4 tex3Dlod_linearize(const sampler3D tex, const float4 tex_coords, const int texel_off)
|
|
{ return decode_input(tex3Dlod(tex, tex_coords, texel_off)); }
|
|
|
|
// tex3Dproj:
|
|
inline float4 tex3Dproj_linearize(const sampler3D tex, const float4 tex_coords)
|
|
{ return decode_input(tex3Dproj(tex, tex_coords)); }
|
|
|
|
inline float4 tex3Dproj_linearize(const sampler3D tex, const float4 tex_coords, const int texel_off)
|
|
{ return decode_input(tex3Dproj(tex, tex_coords, texel_off)); }
|
|
/////////*
|
|
|
|
// NONSTANDARD "SMART" LINEARIZING TEXTURE LOOKUP FUNCTIONS:
|
|
// This narrow selection of nonstandard tex2D* functions can be useful:
|
|
|
|
// tex2Dlod0: Automatically fill in the tex2D LOD parameter for mip level 0.
|
|
//inline float4 tex2Dlod0_linearize(const sampler2D tex, const float2 tex_coords)
|
|
//{ return decode_input(tex2Dlod(tex, float4(tex_coords, 0.0, 0.0))); }
|
|
|
|
//inline float4 tex2Dlod0_linearize(const sampler2D tex, const float2 tex_coords, const int texel_off)
|
|
//{ return decode_input(tex2Dlod(tex, float4(tex_coords, 0.0, 0.0), texel_off)); }
|
|
|
|
|
|
// MANUALLY LINEARIZING TEXTURE LOOKUP FUNCTIONS:
|
|
// Provide a narrower selection of tex2D* wrapper functions that decode an
|
|
// input sample with a specified gamma value. These are useful for reading
|
|
// LUT's and for reading the input of pass0 in a later pass.
|
|
|
|
// tex2D:
|
|
inline float4 tex2D_linearize_gamma(const sampler2D tex, const float2 tex_coords, const float3 gamma)
|
|
{ return decode_gamma_input(COMPAT_TEXTURE(tex, tex_coords), gamma); }
|
|
|
|
inline float4 tex2D_linearize_gamma(const sampler2D tex, const float3 tex_coords, const float3 gamma)
|
|
{ return decode_gamma_input(COMPAT_TEXTURE(tex, tex_coords.xy), gamma); }
|
|
|
|
//inline float4 tex2D_linearize_gamma(const sampler2D tex, const float2 tex_coords, const int texel_off, const float3 gamma)
|
|
//{ return decode_gamma_input(COMPAT_TEXTURE(tex, tex_coords, texel_off), gamma); }
|
|
|
|
//inline float4 tex2D_linearize_gamma(const sampler2D tex, const float3 tex_coords, const int texel_off, const float3 gamma)
|
|
//{ return decode_gamma_input(COMPAT_TEXTURE(tex, tex_coords, texel_off), gamma); }
|
|
|
|
//inline float4 tex2D_linearize_gamma(const sampler2D tex, const float2 tex_coords, const float2 dx, const float2 dy, const float3 gamma)
|
|
//{ return decode_gamma_input(COMPAT_TEXTURE(tex, tex_coords, dx, dy), gamma); }
|
|
|
|
//inline float4 tex2D_linearize_gamma(const sampler2D tex, const float3 tex_coords, const float2 dx, const float2 dy, const float3 gamma)
|
|
//{ return decode_gamma_input(COMPAT_TEXTURE(tex, tex_coords, dx, dy), gamma); }
|
|
|
|
//inline float4 tex2D_linearize_gamma(const sampler2D tex, const float2 tex_coords, const float2 dx, const float2 dy, const int texel_off, const float3 gamma)
|
|
//{ return decode_gamma_input(COMPAT_TEXTURE(tex, tex_coords, dx, dy, texel_off), gamma); }
|
|
|
|
//inline float4 tex2D_linearize_gamma(const sampler2D tex, const float3 tex_coords, const float2 dx, const float2 dy, const int texel_off, const float3 gamma)
|
|
//{ return decode_gamma_input(COMPAT_TEXTURE(tex, tex_coords, dx, dy, texel_off), gamma); }
|
|
/*
|
|
// tex2Dbias:
|
|
inline float4 tex2Dbias_linearize_gamma(const sampler2D tex, const float4 tex_coords, const float3 gamma)
|
|
{ return decode_gamma_input(tex2Dbias(tex, tex_coords), gamma); }
|
|
|
|
inline float4 tex2Dbias_linearize_gamma(const sampler2D tex, const float4 tex_coords, const int texel_off, const float3 gamma)
|
|
{ return decode_gamma_input(tex2Dbias(tex, tex_coords, texel_off), gamma); }
|
|
|
|
// tex2Dfetch:
|
|
inline float4 tex2Dfetch_linearize_gamma(const sampler2D tex, const int4 tex_coords, const float3 gamma)
|
|
{ return decode_gamma_input(tex2Dfetch(tex, tex_coords), gamma); }
|
|
|
|
inline float4 tex2Dfetch_linearize_gamma(const sampler2D tex, const int4 tex_coords, const int texel_off, const float3 gamma)
|
|
{ return decode_gamma_input(tex2Dfetch(tex, tex_coords, texel_off), gamma); }
|
|
*/
|
|
// tex2Dlod:
|
|
inline float4 tex2Dlod_linearize_gamma(const sampler2D tex, float4 tex_coords, float3 gamma)
|
|
{ return decode_gamma_input(textureLod(tex, tex_coords.xy, 0.0), gamma); }
|
|
|
|
inline float4 tex2Dlod_linearize_gamma(const sampler2D tex, float4 tex_coords, int texel_off, float3 gamma)
|
|
{ return decode_gamma_input(textureLod(tex, tex_coords.xy, texel_off), gamma); }
|
|
|
|
|
|
#endif // GAMMA_MANAGEMENT_H
|
|
|
|
//////////////////////////// END GAMMA-MANAGEMENT //////////////////////////
|
|
|
|
//////////////////////////////// END INCLUDES ////////////////////////////////
|
|
|
|
///////////////////////////// SCANLINE FUNCTIONS /////////////////////////////
|
|
|
|
inline float3 get_gaussian_sigma(const float3 color, const float sigma_range)
|
|
{
|
|
// Requires: Globals:
|
|
// 1.) beam_min_sigma and beam_max_sigma are global floats
|
|
// containing the desired minimum and maximum beam standard
|
|
// deviations, for dim and bright colors respectively.
|
|
// 2.) beam_max_sigma must be > 0.0
|
|
// 3.) beam_min_sigma must be in (0.0, beam_max_sigma]
|
|
// 4.) beam_spot_power must be defined as a global float.
|
|
// Parameters:
|
|
// 1.) color is the underlying source color along a scanline
|
|
// 2.) sigma_range = beam_max_sigma - beam_min_sigma; we take
|
|
// sigma_range as a parameter to avoid repeated computation
|
|
// when beam_{min, max}_sigma are runtime shader parameters
|
|
// Optional: Users may set beam_spot_shape_function to 1 to define the
|
|
// inner f(color) subfunction (see below) as:
|
|
// f(color) = sqrt(1.0 - (color - 1.0)*(color - 1.0))
|
|
// Otherwise (technically, if beam_spot_shape_function < 0.5):
|
|
// f(color) = pow(color, beam_spot_power)
|
|
// Returns: The standard deviation of the Gaussian beam for "color:"
|
|
// sigma = beam_min_sigma + sigma_range * f(color)
|
|
// Details/Discussion:
|
|
// The beam's spot shape vaguely resembles an aspect-corrected f() in the
|
|
// range [0, 1] (not quite, but it's related). f(color) = color makes
|
|
// spots look like diamonds, and a spherical function or cube balances
|
|
// between variable width and a soft/realistic shape. A beam_spot_power
|
|
// > 1.0 can produce an ugly spot shape and more initial clipping, but the
|
|
// final shape also differs based on the horizontal resampling filter and
|
|
// the phosphor bloom. For instance, resampling horizontally in nonlinear
|
|
// light and/or with a sharp (e.g. Lanczos) filter will sharpen the spot
|
|
// shape, but a sixth root is still quite soft. A power function (default
|
|
// 1.0/3.0 beam_spot_power) is most flexible, but a fixed spherical curve
|
|
// has the highest variability without an awful spot shape.
|
|
//
|
|
// beam_min_sigma affects scanline sharpness/aliasing in dim areas, and its
|
|
// difference from beam_max_sigma affects beam width variability. It only
|
|
// affects clipping [for pure Gaussians] if beam_spot_power > 1.0 (which is
|
|
// a conservative estimate for a more complex constraint).
|
|
//
|
|
// beam_max_sigma affects clipping and increasing scanline width/softness
|
|
// as color increases. The wider this is, the more scanlines need to be
|
|
// evaluated to avoid distortion. For a pure Gaussian, the max_beam_sigma
|
|
// at which the first unused scanline always has a weight < 1.0/255.0 is:
|
|
// num scanlines = 2, max_beam_sigma = 0.2089; distortions begin ~0.34
|
|
// num scanlines = 3, max_beam_sigma = 0.3879; distortions begin ~0.52
|
|
// num scanlines = 4, max_beam_sigma = 0.5723; distortions begin ~0.70
|
|
// num scanlines = 5, max_beam_sigma = 0.7591; distortions begin ~0.89
|
|
// num scanlines = 6, max_beam_sigma = 0.9483; distortions begin ~1.08
|
|
// Generalized Gaussians permit more leeway here as steepness increases.
|
|
if(beam_spot_shape_function < 0.5)
|
|
{
|
|
// Use a power function:
|
|
return float3(beam_min_sigma) + sigma_range *
|
|
pow(color, float3(beam_spot_power));
|
|
}
|
|
else
|
|
{
|
|
// Use a spherical function:
|
|
const float3 color_minus_1 = color - float3(1.0);
|
|
return float3(beam_min_sigma) + sigma_range *
|
|
sqrt(float3(1.0) - color_minus_1*color_minus_1);
|
|
}
|
|
}
|
|
|
|
inline float3 get_generalized_gaussian_beta(const float3 color,
|
|
const float shape_range)
|
|
{
|
|
// Requires: Globals:
|
|
// 1.) beam_min_shape and beam_max_shape are global floats
|
|
// containing the desired min/max generalized Gaussian
|
|
// beta parameters, for dim and bright colors respectively.
|
|
// 2.) beam_max_shape must be >= 2.0
|
|
// 3.) beam_min_shape must be in [2.0, beam_max_shape]
|
|
// 4.) beam_shape_power must be defined as a global float.
|
|
// Parameters:
|
|
// 1.) color is the underlying source color along a scanline
|
|
// 2.) shape_range = beam_max_shape - beam_min_shape; we take
|
|
// shape_range as a parameter to avoid repeated computation
|
|
// when beam_{min, max}_shape are runtime shader parameters
|
|
// Returns: The type-I generalized Gaussian "shape" parameter beta for
|
|
// the given color.
|
|
// Details/Discussion:
|
|
// Beta affects the scanline distribution as follows:
|
|
// a.) beta < 2.0 narrows the peak to a spike with a discontinuous slope
|
|
// b.) beta == 2.0 just degenerates to a Gaussian
|
|
// c.) beta > 2.0 flattens and widens the peak, then drops off more steeply
|
|
// than a Gaussian. Whereas high sigmas widen and soften peaks, high
|
|
// beta widen and sharpen peaks at the risk of aliasing.
|
|
// Unlike high beam_spot_powers, high beam_shape_powers actually soften shape
|
|
// transitions, whereas lower ones sharpen them (at the risk of aliasing).
|
|
return beam_min_shape + shape_range * pow(color, float3(beam_shape_power));
|
|
}
|
|
|
|
float3 scanline_gaussian_integral_contrib(const float3 dist,
|
|
const float3 color, const float pixel_height, const float sigma_range)
|
|
{
|
|
// Requires: 1.) dist is the distance of the [potentially separate R/G/B]
|
|
// point(s) from a scanline in units of scanlines, where
|
|
// 1.0 means the sample point straddles the next scanline.
|
|
// 2.) color is the underlying source color along a scanline.
|
|
// 3.) pixel_height is the output pixel height in scanlines.
|
|
// 4.) Requirements of get_gaussian_sigma() must be met.
|
|
// Returns: Return a scanline's light output over a given pixel.
|
|
// Details:
|
|
// The CRT beam profile follows a roughly Gaussian distribution which is
|
|
// wider for bright colors than dark ones. The integral over the full
|
|
// range of a Gaussian function is always 1.0, so we can vary the beam
|
|
// with a standard deviation without affecting brightness. 'x' = distance:
|
|
// gaussian sample = 1/(sigma*sqrt(2*pi)) * e**(-(x**2)/(2*sigma**2))
|
|
// gaussian integral = 0.5 (1.0 + erf(x/(sigma * sqrt(2))))
|
|
// Use a numerical approximation of the "error function" (the Gaussian
|
|
// indefinite integral) to find the definite integral of the scanline's
|
|
// average brightness over a given pixel area. Even if curved coords were
|
|
// used in this pass, a flat scalar pixel height works almost as well as a
|
|
// pixel height computed from a full pixel-space to scanline-space matrix.
|
|
const float3 sigma = get_gaussian_sigma(color, sigma_range);
|
|
const float3 ph_offset = float3(pixel_height * 0.5);
|
|
const float3 denom_inv = 1.0/(sigma*sqrt(2.0));
|
|
const float3 integral_high = erf((dist + ph_offset)*denom_inv);
|
|
const float3 integral_low = erf((dist - ph_offset)*denom_inv);
|
|
return color * 0.5*(integral_high - integral_low)/pixel_height;
|
|
}
|
|
|
|
float3 scanline_generalized_gaussian_integral_contrib(float3 dist,
|
|
float3 color, float pixel_height, float sigma_range,
|
|
float shape_range)
|
|
{
|
|
// Requires: 1.) Requirements of scanline_gaussian_integral_contrib()
|
|
// must be met.
|
|
// 2.) Requirements of get_gaussian_sigma() must be met.
|
|
// 3.) Requirements of get_generalized_gaussian_beta() must be
|
|
// met.
|
|
// Returns: Return a scanline's light output over a given pixel.
|
|
// A generalized Gaussian distribution allows the shape (beta) to vary
|
|
// as well as the width (alpha). "gamma" refers to the gamma function:
|
|
// generalized sample =
|
|
// beta/(2*alpha*gamma(1/beta)) * e**(-(|x|/alpha)**beta)
|
|
// ligamma(s, z) is the lower incomplete gamma function, for which we only
|
|
// implement two of four branches (because we keep 1/beta <= 0.5):
|
|
// generalized integral = 0.5 + 0.5* sign(x) *
|
|
// ligamma(1/beta, (|x|/alpha)**beta)/gamma(1/beta)
|
|
// See get_generalized_gaussian_beta() for a discussion of beta.
|
|
// We base alpha on the intended Gaussian sigma, but it only strictly
|
|
// models models standard deviation at beta == 2, because the standard
|
|
// deviation depends on both alpha and beta (keeping alpha independent is
|
|
// faster and preserves intuitive behavior and a full spectrum of results).
|
|
const float3 alpha = sqrt(2.0) * get_gaussian_sigma(color, sigma_range);
|
|
const float3 beta = get_generalized_gaussian_beta(color, shape_range);
|
|
const float3 alpha_inv = float3(1.0)/alpha;
|
|
const float3 s = float3(1.0)/beta;
|
|
const float3 ph_offset = float3(pixel_height * 0.5);
|
|
// Pass beta to gamma_impl to avoid repeated divides. Similarly pass
|
|
// beta (i.e. 1/s) and 1/gamma(s) to normalized_ligamma_impl.
|
|
const float3 gamma_s_inv = float3(1.0)/gamma_impl(s, beta);
|
|
const float3 dist1 = dist + ph_offset;
|
|
const float3 dist0 = dist - ph_offset;
|
|
const float3 integral_high = sign(dist1) * normalized_ligamma_impl(
|
|
s, pow(abs(dist1)*alpha_inv, beta), beta, gamma_s_inv);
|
|
const float3 integral_low = sign(dist0) * normalized_ligamma_impl(
|
|
s, pow(abs(dist0)*alpha_inv, beta), beta, gamma_s_inv);
|
|
return color * 0.5*(integral_high - integral_low)/pixel_height;
|
|
}
|
|
|
|
float3 scanline_gaussian_sampled_contrib(const float3 dist, const float3 color,
|
|
const float pixel_height, const float sigma_range)
|
|
{
|
|
// See scanline_gaussian integral_contrib() for detailed comments!
|
|
// gaussian sample = 1/(sigma*sqrt(2*pi)) * e**(-(x**2)/(2*sigma**2))
|
|
const float3 sigma = get_gaussian_sigma(color, sigma_range);
|
|
// Avoid repeated divides:
|
|
const float3 sigma_inv = float3(1.0)/sigma;
|
|
const float3 inner_denom_inv = 0.5 * sigma_inv * sigma_inv;
|
|
const float3 outer_denom_inv = sigma_inv/sqrt(2.0*pi);
|
|
if(beam_antialias_level > 0.5)
|
|
{
|
|
// Sample 1/3 pixel away in each direction as well:
|
|
const float3 sample_offset = float3(pixel_height/3.0);
|
|
const float3 dist2 = dist + sample_offset;
|
|
const float3 dist3 = abs(dist - sample_offset);
|
|
// Average three pure Gaussian samples:
|
|
const float3 scale = color/3.0 * outer_denom_inv;
|
|
const float3 weight1 = exp(-(dist*dist)*inner_denom_inv);
|
|
const float3 weight2 = exp(-(dist2*dist2)*inner_denom_inv);
|
|
const float3 weight3 = exp(-(dist3*dist3)*inner_denom_inv);
|
|
return scale * (weight1 + weight2 + weight3);
|
|
}
|
|
else
|
|
{
|
|
return color*exp(-(dist*dist)*inner_denom_inv)*outer_denom_inv;
|
|
}
|
|
}
|
|
|
|
float3 scanline_generalized_gaussian_sampled_contrib(float3 dist,
|
|
float3 color, float pixel_height, float sigma_range,
|
|
float shape_range)
|
|
{
|
|
// See scanline_generalized_gaussian_integral_contrib() for details!
|
|
// generalized sample =
|
|
// beta/(2*alpha*gamma(1/beta)) * e**(-(|x|/alpha)**beta)
|
|
const float3 alpha = sqrt(2.0) * get_gaussian_sigma(color, sigma_range);
|
|
const float3 beta = get_generalized_gaussian_beta(color, shape_range);
|
|
// Avoid repeated divides:
|
|
const float3 alpha_inv = float3(1.0)/alpha;
|
|
const float3 beta_inv = float3(1.0)/beta;
|
|
const float3 scale = color * beta * 0.5 * alpha_inv /
|
|
gamma_impl(beta_inv, beta);
|
|
if(beam_antialias_level > 0.5)
|
|
{
|
|
// Sample 1/3 pixel closer to and farther from the scanline too.
|
|
const float3 sample_offset = float3(pixel_height/3.0);
|
|
const float3 dist2 = dist + sample_offset;
|
|
const float3 dist3 = abs(dist - sample_offset);
|
|
// Average three generalized Gaussian samples:
|
|
const float3 weight1 = exp(-pow(abs(dist*alpha_inv), beta));
|
|
const float3 weight2 = exp(-pow(abs(dist2*alpha_inv), beta));
|
|
const float3 weight3 = exp(-pow(abs(dist3*alpha_inv), beta));
|
|
return scale/3.0 * (weight1 + weight2 + weight3);
|
|
}
|
|
else
|
|
{
|
|
return scale * exp(-pow(abs(dist*alpha_inv), beta));
|
|
}
|
|
}
|
|
|
|
inline float3 scanline_contrib(float3 dist, float3 color,
|
|
float pixel_height, const float sigma_range, const float shape_range)
|
|
{
|
|
// Requires: 1.) Requirements of scanline_gaussian_integral_contrib()
|
|
// must be met.
|
|
// 2.) Requirements of get_gaussian_sigma() must be met.
|
|
// 3.) Requirements of get_generalized_gaussian_beta() must be
|
|
// met.
|
|
// Returns: Return a scanline's light output over a given pixel, using
|
|
// a generalized or pure Gaussian distribution and sampling or
|
|
// integrals as desired by user codepath choices.
|
|
if(beam_generalized_gaussian)
|
|
{
|
|
if(beam_antialias_level > 1.5)
|
|
{
|
|
return scanline_generalized_gaussian_integral_contrib(
|
|
dist, color, pixel_height, sigma_range, shape_range);
|
|
}
|
|
else
|
|
{
|
|
return scanline_generalized_gaussian_sampled_contrib(
|
|
dist, color, pixel_height, sigma_range, shape_range);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if(beam_antialias_level > 1.5)
|
|
{
|
|
return scanline_gaussian_integral_contrib(
|
|
dist, color, pixel_height, sigma_range);
|
|
}
|
|
else
|
|
{
|
|
return scanline_gaussian_sampled_contrib(
|
|
dist, color, pixel_height, sigma_range);
|
|
}
|
|
}
|
|
}
|
|
|
|
inline float3 get_raw_interpolated_color(const float3 color0,
|
|
const float3 color1, const float3 color2, const float3 color3,
|
|
const float4 weights)
|
|
{
|
|
// Use max to avoid bizarre artifacts from negative colors:
|
|
return max(mul(weights, float4x3(color0, color1, color2, color3)), 0.0);
|
|
}
|
|
|
|
float3 get_interpolated_linear_color(const float3 color0, const float3 color1,
|
|
const float3 color2, const float3 color3, const float4 weights)
|
|
{
|
|
// Requires: 1.) Requirements of include/gamma-management.h must be met:
|
|
// intermediate_gamma must be globally defined, and input
|
|
// colors are interpreted as linear RGB unless you #define
|
|
// GAMMA_ENCODE_EVERY_FBO (in which case they are
|
|
// interpreted as gamma-encoded with intermediate_gamma).
|
|
// 2.) color0-3 are colors sampled from a texture with tex2D().
|
|
// They are interpreted as defined in requirement 1.
|
|
// 3.) weights contains weights for each color, summing to 1.0.
|
|
// 4.) beam_horiz_linear_rgb_weight must be defined as a global
|
|
// float in [0.0, 1.0] describing how much blending should
|
|
// be done in linear RGB (rest is gamma-corrected RGB).
|
|
// 5.) RUNTIME_SCANLINES_HORIZ_FILTER_COLORSPACE must be #defined
|
|
// if beam_horiz_linear_rgb_weight is anything other than a
|
|
// static constant, or we may try branching at runtime
|
|
// without dynamic branches allowed (slow).
|
|
// Returns: Return an interpolated color lookup between the four input
|
|
// colors based on the weights in weights. The final color will
|
|
// be a linear RGB value, but the blending will be done as
|
|
// indicated above.
|
|
const float intermediate_gamma = get_intermediate_gamma();
|
|
// Branch if beam_horiz_linear_rgb_weight is static (for free) or if the
|
|
// profile allows dynamic branches (faster than computing extra pows):
|
|
#ifndef RUNTIME_SCANLINES_HORIZ_FILTER_COLORSPACE
|
|
#define SCANLINES_BRANCH_FOR_LINEAR_RGB_WEIGHT
|
|
#else
|
|
#ifdef DRIVERS_ALLOW_DYNAMIC_BRANCHES
|
|
#define SCANLINES_BRANCH_FOR_LINEAR_RGB_WEIGHT
|
|
#endif
|
|
#endif
|
|
#ifdef SCANLINES_BRANCH_FOR_LINEAR_RGB_WEIGHT
|
|
// beam_horiz_linear_rgb_weight is static, so we can branch:
|
|
#ifdef GAMMA_ENCODE_EVERY_FBO
|
|
const float3 gamma_mixed_color = pow(get_raw_interpolated_color(
|
|
color0, color1, color2, color3, weights), float3(intermediate_gamma));
|
|
if(beam_horiz_linear_rgb_weight > 0.0)
|
|
{
|
|
const float3 linear_mixed_color = get_raw_interpolated_color(
|
|
pow(color0, float3(intermediate_gamma)),
|
|
pow(color1, float3(intermediate_gamma)),
|
|
pow(color2, float3(intermediate_gamma)),
|
|
pow(color3, float3(intermediate_gamma)),
|
|
weights);
|
|
return lerp(gamma_mixed_color, linear_mixed_color,
|
|
beam_horiz_linear_rgb_weight);
|
|
}
|
|
else
|
|
{
|
|
return gamma_mixed_color;
|
|
}
|
|
#else
|
|
const float3 linear_mixed_color = get_raw_interpolated_color(
|
|
color0, color1, color2, color3, weights);
|
|
if(beam_horiz_linear_rgb_weight < 1.0)
|
|
{
|
|
const float3 gamma_mixed_color = get_raw_interpolated_color(
|
|
pow(color0, float3(1.0/intermediate_gamma)),
|
|
pow(color1, float3(1.0/intermediate_gamma)),
|
|
pow(color2, float3(1.0/intermediate_gamma)),
|
|
pow(color3, float3(1.0/intermediate_gamma)),
|
|
weights);
|
|
return lerp(gamma_mixed_color, linear_mixed_color,
|
|
beam_horiz_linear_rgb_weight);
|
|
}
|
|
else
|
|
{
|
|
return linear_mixed_color;
|
|
}
|
|
#endif // GAMMA_ENCODE_EVERY_FBO
|
|
#else
|
|
#ifdef GAMMA_ENCODE_EVERY_FBO
|
|
// Inputs: color0-3 are colors in gamma-encoded RGB.
|
|
const float3 gamma_mixed_color = pow(get_raw_interpolated_color(
|
|
color0, color1, color2, color3, weights), intermediate_gamma);
|
|
const float3 linear_mixed_color = get_raw_interpolated_color(
|
|
pow(color0, float3(intermediate_gamma)),
|
|
pow(color1, float3(intermediate_gamma)),
|
|
pow(color2, float3(intermediate_gamma)),
|
|
pow(color3, float3(intermediate_gamma)),
|
|
weights);
|
|
return lerp(gamma_mixed_color, linear_mixed_color,
|
|
beam_horiz_linear_rgb_weight);
|
|
#else
|
|
// Inputs: color0-3 are colors in linear RGB.
|
|
const float3 linear_mixed_color = get_raw_interpolated_color(
|
|
color0, color1, color2, color3, weights);
|
|
const float3 gamma_mixed_color = get_raw_interpolated_color(
|
|
pow(color0, float3(1.0/intermediate_gamma)),
|
|
pow(color1, float3(1.0/intermediate_gamma)),
|
|
pow(color2, float3(1.0/intermediate_gamma)),
|
|
pow(color3, float3(1.0/intermediate_gamma)),
|
|
weights);
|
|
// wtf fixme
|
|
// const float beam_horiz_linear_rgb_weight1 = 1.0;
|
|
return lerp(gamma_mixed_color, linear_mixed_color,
|
|
beam_horiz_linear_rgb_weight);
|
|
#endif // GAMMA_ENCODE_EVERY_FBO
|
|
#endif // SCANLINES_BRANCH_FOR_LINEAR_RGB_WEIGHT
|
|
}
|
|
|
|
float3 get_scanline_color(const sampler2D tex, const float2 scanline_uv,
|
|
const float2 uv_step_x, const float4 weights)
|
|
{
|
|
// Requires: 1.) scanline_uv must be vertically snapped to the caller's
|
|
// desired line or scanline and horizontally snapped to the
|
|
// texel just left of the output pixel (color1)
|
|
// 2.) uv_step_x must contain the horizontal uv distance
|
|
// between texels.
|
|
// 3.) weights must contain interpolation filter weights for
|
|
// color0, color1, color2, and color3, where color1 is just
|
|
// left of the output pixel.
|
|
// Returns: Return a horizontally interpolated texture lookup using 2-4
|
|
// nearby texels, according to weights and the conventions of
|
|
// get_interpolated_linear_color().
|
|
// We can ignore the outside texture lookups for Quilez resampling.
|
|
const float3 color1 = COMPAT_TEXTURE(tex, scanline_uv).rgb;
|
|
const float3 color2 = COMPAT_TEXTURE(tex, scanline_uv + uv_step_x).rgb;
|
|
float3 color0 = float3(0.0);
|
|
float3 color3 = float3(0.0);
|
|
if(beam_horiz_filter > 0.5)
|
|
{
|
|
color0 = COMPAT_TEXTURE(tex, scanline_uv - uv_step_x).rgb;
|
|
color3 = COMPAT_TEXTURE(tex, scanline_uv + 2.0 * uv_step_x).rgb;
|
|
}
|
|
// Sample the texture as-is, whether it's linear or gamma-encoded:
|
|
// get_interpolated_linear_color() will handle the difference.
|
|
return get_interpolated_linear_color(color0, color1, color2, color3, weights);
|
|
}
|
|
|
|
float3 sample_single_scanline_horizontal(const sampler2D tex,
|
|
const float2 tex_uv, const float2 tex_size,
|
|
const float2 texture_size_inv)
|
|
{
|
|
// TODO: Add function requirements.
|
|
// Snap to the previous texel and get sample dists from 2/4 nearby texels:
|
|
const float2 curr_texel = tex_uv * tex_size;
|
|
// Use under_half to fix a rounding bug right around exact texel locations.
|
|
const float2 prev_texel =
|
|
floor(curr_texel - float2(under_half)) + float2(0.5);
|
|
const float2 prev_texel_hor = float2(prev_texel.x, curr_texel.y);
|
|
const float2 prev_texel_hor_uv = prev_texel_hor * texture_size_inv;
|
|
const float prev_dist = curr_texel.x - prev_texel_hor.x;
|
|
const float4 sample_dists = float4(1.0 + prev_dist, prev_dist,
|
|
1.0 - prev_dist, 2.0 - prev_dist);
|
|
// Get Quilez, Lanczos2, or Gaussian resize weights for 2/4 nearby texels:
|
|
float4 weights;
|
|
if(beam_horiz_filter < 0.5)
|
|
{
|
|
// Quilez:
|
|
const float x = sample_dists.y;
|
|
const float w2 = x*x*x*(x*(x*6.0 - 15.0) + 10.0);
|
|
weights = float4(0.0, 1.0 - w2, w2, 0.0);
|
|
}
|
|
else if(beam_horiz_filter < 1.5)
|
|
{
|
|
// Gaussian:
|
|
float inner_denom_inv = 1.0/(2.0*beam_horiz_sigma*beam_horiz_sigma);
|
|
weights = exp(-(sample_dists*sample_dists)*inner_denom_inv);
|
|
}
|
|
else
|
|
{
|
|
// Lanczos2:
|
|
const float4 pi_dists = FIX_ZERO(sample_dists * pi);
|
|
weights = 2.0 * sin(pi_dists) * sin(pi_dists * 0.5) /
|
|
(pi_dists * pi_dists);
|
|
}
|
|
// Ensure the weight sum == 1.0:
|
|
const float4 final_weights = weights/dot(weights, float4(1.0));
|
|
// Get the interpolated horizontal scanline color:
|
|
const float2 uv_step_x = float2(texture_size_inv.x, 0.0);
|
|
return get_scanline_color(
|
|
tex, prev_texel_hor_uv, uv_step_x, final_weights);
|
|
}
|
|
|
|
float3 sample_rgb_scanline_horizontal(const sampler2D tex,
|
|
const float2 tex_uv, const float2 tex_size,
|
|
const float2 texture_size_inv)
|
|
{
|
|
// TODO: Add function requirements.
|
|
// Rely on a helper to make convergence easier.
|
|
if(beam_misconvergence)
|
|
{
|
|
const float3 convergence_offsets_rgb =
|
|
get_convergence_offsets_x_vector();
|
|
const float3 offset_u_rgb =
|
|
convergence_offsets_rgb * texture_size_inv.xxx;
|
|
const float2 scanline_uv_r = tex_uv - float2(offset_u_rgb.r, 0.0);
|
|
const float2 scanline_uv_g = tex_uv - float2(offset_u_rgb.g, 0.0);
|
|
const float2 scanline_uv_b = tex_uv - float2(offset_u_rgb.b, 0.0);
|
|
const float3 sample_r = sample_single_scanline_horizontal(
|
|
tex, scanline_uv_r, tex_size, texture_size_inv);
|
|
const float3 sample_g = sample_single_scanline_horizontal(
|
|
tex, scanline_uv_g, tex_size, texture_size_inv);
|
|
const float3 sample_b = sample_single_scanline_horizontal(
|
|
tex, scanline_uv_b, tex_size, texture_size_inv);
|
|
return float3(sample_r.r, sample_g.g, sample_b.b);
|
|
}
|
|
else
|
|
{
|
|
return sample_single_scanline_horizontal(tex, tex_uv, tex_size,
|
|
texture_size_inv);
|
|
}
|
|
}
|
|
|
|
float2 get_last_scanline_uv(const float2 tex_uv, const float2 tex_size,
|
|
const float2 texture_size_inv, const float2 il_step_multiple,
|
|
const float frame_count, out float dist)
|
|
{
|
|
// Compute texture coords for the last/upper scanline, accounting for
|
|
// interlacing: With interlacing, only consider even/odd scanlines every
|
|
// other frame. Top-field first (TFF) order puts even scanlines on even
|
|
// frames, and BFF order puts them on odd frames. Texels are centered at:
|
|
// frac(tex_uv * tex_size) == x.5
|
|
// Caution: If these coordinates ever seem incorrect, first make sure it's
|
|
// not because anisotropic filtering is blurring across field boundaries.
|
|
// Note: TFF/BFF won't matter for sources that double-weave or similar.
|
|
// wtf fixme
|
|
// const float interlace_bff1 = 1.0;
|
|
const float field_offset = floor(il_step_multiple.y * 0.75) *
|
|
fmod(frame_count + float(interlace_bff), 2.0);
|
|
const float2 curr_texel = tex_uv * tex_size;
|
|
// Use under_half to fix a rounding bug right around exact texel locations.
|
|
const float2 prev_texel_num = floor(curr_texel - float2(under_half));
|
|
const float wrong_field = fmod(
|
|
prev_texel_num.y + field_offset, il_step_multiple.y);
|
|
const float2 scanline_texel_num = prev_texel_num - float2(0.0, wrong_field);
|
|
// Snap to the center of the previous scanline in the current field:
|
|
const float2 scanline_texel = scanline_texel_num + float2(0.5);
|
|
const float2 scanline_uv = scanline_texel * texture_size_inv;
|
|
// Save the sample's distance from the scanline, in units of scanlines:
|
|
dist = (curr_texel.y - scanline_texel.y)/il_step_multiple.y;
|
|
return scanline_uv;
|
|
}
|
|
|
|
inline bool is_interlaced(float num_lines)
|
|
{
|
|
// Detect interlacing based on the number of lines in the source.
|
|
if(interlace_detect)
|
|
{
|
|
// NTSC: 525 lines, 262.5/field; 486 active (2 half-lines), 243/field
|
|
// NTSC Emulators: Typically 224 or 240 lines
|
|
// PAL: 625 lines, 312.5/field; 576 active (typical), 288/field
|
|
// PAL Emulators: ?
|
|
// ATSC: 720p, 1080i, 1080p
|
|
// Where do we place our cutoffs? Assumptions:
|
|
// 1.) We only need to care about active lines.
|
|
// 2.) Anything > 288 and <= 576 lines is probably interlaced.
|
|
// 3.) Anything > 576 lines is probably not interlaced...
|
|
// 4.) ...except 1080 lines, which is a crapshoot (user decision).
|
|
// 5.) Just in case the main program uses calculated video sizes,
|
|
// we should nudge the float thresholds a bit.
|
|
const bool sd_interlace = ((num_lines > 288.5) && (num_lines < 576.5));
|
|
const bool hd_interlace = bool(interlace_1080i) ?
|
|
((num_lines > 1079.5) && (num_lines < 1080.5)) :
|
|
false;
|
|
return (sd_interlace || hd_interlace);
|
|
}
|
|
else
|
|
{
|
|
return false;
|
|
}
|
|
}
|
|
|
|
#endif // SCANLINE_FUNCTIONS_H
|
|
|
|
///////////////////////////// END SCANLINE-FUNCTIONS ////////////////////////////
|
|
|
|
//#include "../../../../include/gamma-management.h"
|
|
|
|
//////////////////////////// BEGIN GAMMA-MANAGEMENT //////////////////////////
|
|
|
|
#ifndef GAMMA_MANAGEMENT_H
|
|
#define GAMMA_MANAGEMENT_H
|
|
|
|
///////////////////////////////// MIT LICENSE ////////////////////////////////
|
|
|
|
// Copyright (C) 2014 TroggleMonkey
|
|
//
|
|
// Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
// of this software and associated documentation files (the "Software"), to
|
|
// deal in the Software without restriction, including without limitation the
|
|
// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
|
|
// sell copies of the Software, and to permit persons to whom the Software is
|
|
// furnished to do so, subject to the following conditions:
|
|
//
|
|
// The above copyright notice and this permission notice shall be included in
|
|
// all copies or substantial portions of the Software.
|
|
//
|
|
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
|
|
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
|
|
// IN THE SOFTWARE.
|
|
|
|
///////////////////////////////// DESCRIPTION ////////////////////////////////
|
|
|
|
// This file provides gamma-aware tex*D*() and encode_output() functions.
|
|
// Requires: Before #include-ing this file, the including file must #define
|
|
// the following macros when applicable and follow their rules:
|
|
// 1.) #define FIRST_PASS if this is the first pass.
|
|
// 2.) #define LAST_PASS if this is the last pass.
|
|
// 3.) If sRGB is available, set srgb_framebufferN = "true" for
|
|
// every pass except the last in your .cgp preset.
|
|
// 4.) If sRGB isn't available but you want gamma-correctness with
|
|
// no banding, #define GAMMA_ENCODE_EVERY_FBO each pass.
|
|
// 5.) #define SIMULATE_CRT_ON_LCD if desired (precedence over 5-7)
|
|
// 6.) #define SIMULATE_GBA_ON_LCD if desired (precedence over 6-7)
|
|
// 7.) #define SIMULATE_LCD_ON_CRT if desired (precedence over 7)
|
|
// 8.) #define SIMULATE_GBA_ON_CRT if desired (precedence over -)
|
|
// If an option in [5, 8] is #defined in the first or last pass, it
|
|
// should be #defined for both. It shouldn't make a difference
|
|
// whether it's #defined for intermediate passes or not.
|
|
// Optional: The including file (or an earlier included file) may optionally
|
|
// #define a number of macros indicating it will override certain
|
|
// macros and associated constants are as follows:
|
|
// static constants with either static or uniform constants. The
|
|
// 1.) OVERRIDE_STANDARD_GAMMA: The user must first define:
|
|
// static const float ntsc_gamma
|
|
// static const float pal_gamma
|
|
// static const float crt_reference_gamma_high
|
|
// static const float crt_reference_gamma_low
|
|
// static const float lcd_reference_gamma
|
|
// static const float crt_office_gamma
|
|
// static const float lcd_office_gamma
|
|
// 2.) OVERRIDE_DEVICE_GAMMA: The user must first define:
|
|
// static const float crt_gamma
|
|
// static const float gba_gamma
|
|
// static const float lcd_gamma
|
|
// 3.) OVERRIDE_FINAL_GAMMA: The user must first define:
|
|
// static const float input_gamma
|
|
// static const float intermediate_gamma
|
|
// static const float output_gamma
|
|
// (intermediate_gamma is for GAMMA_ENCODE_EVERY_FBO.)
|
|
// 4.) OVERRIDE_ALPHA_ASSUMPTIONS: The user must first define:
|
|
// static const bool assume_opaque_alpha
|
|
// The gamma constant overrides must be used in every pass or none,
|
|
// and OVERRIDE_FINAL_GAMMA bypasses all of the SIMULATE* macros.
|
|
// OVERRIDE_ALPHA_ASSUMPTIONS may be set on a per-pass basis.
|
|
// Usage: After setting macros appropriately, ignore gamma correction and
|
|
// replace all tex*D*() calls with equivalent gamma-aware
|
|
// tex*D*_linearize calls, except:
|
|
// 1.) When you read an LUT, use regular tex*D or a gamma-specified
|
|
// function, depending on its gamma encoding:
|
|
// tex*D*_linearize_gamma (takes a runtime gamma parameter)
|
|
// 2.) If you must read pass0's original input in a later pass, use
|
|
// tex2D_linearize_ntsc_gamma. If you want to read pass0's
|
|
// input with gamma-corrected bilinear filtering, consider
|
|
// creating a first linearizing pass and reading from the input
|
|
// of pass1 later.
|
|
// Then, return encode_output(color) from every fragment shader.
|
|
// Finally, use the global gamma_aware_bilinear boolean if you want
|
|
// to statically branch based on whether bilinear filtering is
|
|
// gamma-correct or not (e.g. for placing Gaussian blur samples).
|
|
//
|
|
// Detailed Policy:
|
|
// tex*D*_linearize() functions enforce a consistent gamma-management policy
|
|
// based on the FIRST_PASS and GAMMA_ENCODE_EVERY_FBO settings. They assume
|
|
// their input texture has the same encoding characteristics as the input for
|
|
// the current pass (which doesn't apply to the exceptions listed above).
|
|
// Similarly, encode_output() enforces a policy based on the LAST_PASS and
|
|
// GAMMA_ENCODE_EVERY_FBO settings. Together, they result in one of the
|
|
// following two pipelines.
|
|
// Typical pipeline with intermediate sRGB framebuffers:
|
|
// linear_color = pow(pass0_encoded_color, input_gamma);
|
|
// intermediate_output = linear_color; // Automatic sRGB encoding
|
|
// linear_color = intermediate_output; // Automatic sRGB decoding
|
|
// final_output = pow(intermediate_output, 1.0/output_gamma);
|
|
// Typical pipeline without intermediate sRGB framebuffers:
|
|
// linear_color = pow(pass0_encoded_color, input_gamma);
|
|
// intermediate_output = pow(linear_color, 1.0/intermediate_gamma);
|
|
// linear_color = pow(intermediate_output, intermediate_gamma);
|
|
// final_output = pow(intermediate_output, 1.0/output_gamma);
|
|
// Using GAMMA_ENCODE_EVERY_FBO is much slower, but it's provided as a way to
|
|
// easily get gamma-correctness without banding on devices where sRGB isn't
|
|
// supported.
|
|
//
|
|
// Use This Header to Maximize Code Reuse:
|
|
// The purpose of this header is to provide a consistent interface for texture
|
|
// reads and output gamma-encoding that localizes and abstracts away all the
|
|
// annoying details. This greatly reduces the amount of code in each shader
|
|
// pass that depends on the pass number in the .cgp preset or whether sRGB
|
|
// FBO's are being used: You can trivially change the gamma behavior of your
|
|
// whole pass by commenting or uncommenting 1-3 #defines. To reuse the same
|
|
// code in your first, Nth, and last passes, you can even put it all in another
|
|
// header file and #include it from skeleton .cg files that #define the
|
|
// appropriate pass-specific settings.
|
|
//
|
|
// Rationale for Using Three Macros:
|
|
// This file uses GAMMA_ENCODE_EVERY_FBO instead of an opposite macro like
|
|
// SRGB_PIPELINE to ensure sRGB is assumed by default, which hopefully imposes
|
|
// a lower maintenance burden on each pass. At first glance it seems we could
|
|
// accomplish everything with two macros: GAMMA_CORRECT_IN / GAMMA_CORRECT_OUT.
|
|
// This works for simple use cases where input_gamma == output_gamma, but it
|
|
// breaks down for more complex scenarios like CRT simulation, where the pass
|
|
// number determines the gamma encoding of the input and output.
|
|
|
|
|
|
/////////////////////////////// BASE CONSTANTS ///////////////////////////////
|
|
|
|
// Set standard gamma constants, but allow users to override them:
|
|
#ifndef OVERRIDE_STANDARD_GAMMA
|
|
// Standard encoding gammas:
|
|
static const float ntsc_gamma = 2.2; // Best to use NTSC for PAL too?
|
|
static const float pal_gamma = 2.8; // Never actually 2.8 in practice
|
|
// Typical device decoding gammas (only use for emulating devices):
|
|
// CRT/LCD reference gammas are higher than NTSC and Rec.709 video standard
|
|
// gammas: The standards purposely undercorrected for an analog CRT's
|
|
// assumed 2.5 reference display gamma to maintain contrast in assumed
|
|
// [dark] viewing conditions: http://www.poynton.com/PDFs/GammaFAQ.pdf
|
|
// These unstated assumptions about display gamma and perceptual rendering
|
|
// intent caused a lot of confusion, and more modern CRT's seemed to target
|
|
// NTSC 2.2 gamma with circuitry. LCD displays seem to have followed suit
|
|
// (they struggle near black with 2.5 gamma anyway), especially PC/laptop
|
|
// displays designed to view sRGB in bright environments. (Standards are
|
|
// also in flux again with BT.1886, but it's underspecified for displays.)
|
|
static const float crt_reference_gamma_high = 2.5; // In (2.35, 2.55)
|
|
static const float crt_reference_gamma_low = 2.35; // In (2.35, 2.55)
|
|
static const float lcd_reference_gamma = 2.5; // To match CRT
|
|
static const float crt_office_gamma = 2.2; // Circuitry-adjusted for NTSC
|
|
static const float lcd_office_gamma = 2.2; // Approximates sRGB
|
|
#endif // OVERRIDE_STANDARD_GAMMA
|
|
|
|
// Assuming alpha == 1.0 might make it easier for users to avoid some bugs,
|
|
// but only if they're aware of it.
|
|
#ifndef OVERRIDE_ALPHA_ASSUMPTIONS
|
|
static const bool assume_opaque_alpha = false;
|
|
#endif
|
|
|
|
|
|
/////////////////////// DERIVED CONSTANTS AS FUNCTIONS ///////////////////////
|
|
|
|
// gamma-management.h should be compatible with overriding gamma values with
|
|
// runtime user parameters, but we can only define other global constants in
|
|
// terms of static constants, not uniform user parameters. To get around this
|
|
// limitation, we need to define derived constants using functions.
|
|
|
|
// Set device gamma constants, but allow users to override them:
|
|
#ifdef OVERRIDE_DEVICE_GAMMA
|
|
// The user promises to globally define the appropriate constants:
|
|
inline float get_crt_gamma() { return crt_gamma; }
|
|
inline float get_gba_gamma() { return gba_gamma; }
|
|
inline float get_lcd_gamma() { return lcd_gamma; }
|
|
#else
|
|
inline float get_crt_gamma() { return crt_reference_gamma_high; }
|
|
inline float get_gba_gamma() { return 3.5; } // Game Boy Advance; in (3.0, 4.0)
|
|
inline float get_lcd_gamma() { return lcd_office_gamma; }
|
|
#endif // OVERRIDE_DEVICE_GAMMA
|
|
|
|
// Set decoding/encoding gammas for the first/lass passes, but allow overrides:
|
|
#ifdef OVERRIDE_FINAL_GAMMA
|
|
// The user promises to globally define the appropriate constants:
|
|
inline float get_intermediate_gamma() { return intermediate_gamma; }
|
|
inline float get_input_gamma() { return input_gamma; }
|
|
inline float get_output_gamma() { return output_gamma; }
|
|
#else
|
|
// If we gamma-correct every pass, always use ntsc_gamma between passes to
|
|
// ensure middle passes don't need to care if anything is being simulated:
|
|
inline float get_intermediate_gamma() { return ntsc_gamma; }
|
|
#ifdef SIMULATE_CRT_ON_LCD
|
|
inline float get_input_gamma() { return get_crt_gamma(); }
|
|
inline float get_output_gamma() { return get_lcd_gamma(); }
|
|
#else
|
|
#ifdef SIMULATE_GBA_ON_LCD
|
|
inline float get_input_gamma() { return get_gba_gamma(); }
|
|
inline float get_output_gamma() { return get_lcd_gamma(); }
|
|
#else
|
|
#ifdef SIMULATE_LCD_ON_CRT
|
|
inline float get_input_gamma() { return get_lcd_gamma(); }
|
|
inline float get_output_gamma() { return get_crt_gamma(); }
|
|
#else
|
|
#ifdef SIMULATE_GBA_ON_CRT
|
|
inline float get_input_gamma() { return get_gba_gamma(); }
|
|
inline float get_output_gamma() { return get_crt_gamma(); }
|
|
#else // Don't simulate anything:
|
|
inline float get_input_gamma() { return ntsc_gamma; }
|
|
inline float get_output_gamma() { return ntsc_gamma; }
|
|
#endif // SIMULATE_GBA_ON_CRT
|
|
#endif // SIMULATE_LCD_ON_CRT
|
|
#endif // SIMULATE_GBA_ON_LCD
|
|
#endif // SIMULATE_CRT_ON_LCD
|
|
#endif // OVERRIDE_FINAL_GAMMA
|
|
|
|
// Set decoding/encoding gammas for the current pass. Use static constants for
|
|
// linearize_input and gamma_encode_output, because they aren't derived, and
|
|
// they let the compiler do dead-code elimination.
|
|
#ifndef GAMMA_ENCODE_EVERY_FBO
|
|
#ifdef FIRST_PASS
|
|
static const bool linearize_input = true;
|
|
inline float get_pass_input_gamma() { return get_input_gamma(); }
|
|
#else
|
|
static const bool linearize_input = false;
|
|
inline float get_pass_input_gamma() { return 1.0; }
|
|
#endif
|
|
#ifdef LAST_PASS
|
|
static const bool gamma_encode_output = true;
|
|
inline float get_pass_output_gamma() { return get_output_gamma(); }
|
|
#else
|
|
static const bool gamma_encode_output = false;
|
|
inline float get_pass_output_gamma() { return 1.0; }
|
|
#endif
|
|
#else
|
|
static const bool linearize_input = true;
|
|
static const bool gamma_encode_output = true;
|
|
#ifdef FIRST_PASS
|
|
inline float get_pass_input_gamma() { return get_input_gamma(); }
|
|
#else
|
|
inline float get_pass_input_gamma() { return get_intermediate_gamma(); }
|
|
#endif
|
|
#ifdef LAST_PASS
|
|
inline float get_pass_output_gamma() { return get_output_gamma(); }
|
|
#else
|
|
inline float get_pass_output_gamma() { return get_intermediate_gamma(); }
|
|
#endif
|
|
#endif
|
|
|
|
// Users might want to know if bilinear filtering will be gamma-correct:
|
|
static const bool gamma_aware_bilinear = !linearize_input;
|
|
|
|
|
|
////////////////////// COLOR ENCODING/DECODING FUNCTIONS /////////////////////
|
|
|
|
inline float4 encode_output(const float4 color)
|
|
{
|
|
if(gamma_encode_output)
|
|
{
|
|
if(assume_opaque_alpha)
|
|
{
|
|
return float4(pow(color.rgb, float3(1.0/get_pass_output_gamma())), 1.0);
|
|
}
|
|
else
|
|
{
|
|
return float4(pow(color.rgb, float3(1.0/get_pass_output_gamma())), color.a);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
return color;
|
|
}
|
|
}
|
|
|
|
inline float4 decode_input(const float4 color)
|
|
{
|
|
if(linearize_input)
|
|
{
|
|
if(assume_opaque_alpha)
|
|
{
|
|
return float4(pow(color.rgb, float3(get_pass_input_gamma())), 1.0);
|
|
}
|
|
else
|
|
{
|
|
return float4(pow(color.rgb, float3(get_pass_input_gamma())), color.a);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
return color;
|
|
}
|
|
}
|
|
|
|
inline float4 decode_gamma_input(const float4 color, const float3 gamma)
|
|
{
|
|
if(assume_opaque_alpha)
|
|
{
|
|
return float4(pow(color.rgb, gamma), 1.0);
|
|
}
|
|
else
|
|
{
|
|
return float4(pow(color.rgb, gamma), color.a);
|
|
}
|
|
}
|
|
|
|
//TODO/FIXME: I have no idea why replacing the lookup wrappers with this macro fixes the blurs being offset ¯\_(ツ)_/¯
|
|
//#define tex2D_linearize(C, D) decode_input(vec4(COMPAT_TEXTURE(C, D)))
|
|
// EDIT: it's the 'const' in front of the coords that's doing it
|
|
|
|
/////////////////////////// TEXTURE LOOKUP WRAPPERS //////////////////////////
|
|
|
|
// "SMART" LINEARIZING TEXTURE LOOKUP FUNCTIONS:
|
|
// Provide a wide array of linearizing texture lookup wrapper functions. The
|
|
// Cg shader spec Retroarch uses only allows for 2D textures, but 1D and 3D
|
|
// lookups are provided for completeness in case that changes someday. Nobody
|
|
// is likely to use the *fetch and *proj functions, but they're included just
|
|
// in case. The only tex*D texture sampling functions omitted are:
|
|
// - tex*Dcmpbias
|
|
// - tex*Dcmplod
|
|
// - tex*DARRAY*
|
|
// - tex*DMS*
|
|
// - Variants returning integers
|
|
// Standard line length restrictions are ignored below for vertical brevity.
|
|
/*
|
|
// tex1D:
|
|
inline float4 tex1D_linearize(const sampler1D tex, const float tex_coords)
|
|
{ return decode_input(tex1D(tex, tex_coords)); }
|
|
|
|
inline float4 tex1D_linearize(const sampler1D tex, const float2 tex_coords)
|
|
{ return decode_input(tex1D(tex, tex_coords)); }
|
|
|
|
inline float4 tex1D_linearize(const sampler1D tex, const float tex_coords, const int texel_off)
|
|
{ return decode_input(tex1D(tex, tex_coords, texel_off)); }
|
|
|
|
inline float4 tex1D_linearize(const sampler1D tex, const float2 tex_coords, const int texel_off)
|
|
{ return decode_input(tex1D(tex, tex_coords, texel_off)); }
|
|
|
|
inline float4 tex1D_linearize(const sampler1D tex, const float tex_coords, const float dx, const float dy)
|
|
{ return decode_input(tex1D(tex, tex_coords, dx, dy)); }
|
|
|
|
inline float4 tex1D_linearize(const sampler1D tex, const float2 tex_coords, const float dx, const float dy)
|
|
{ return decode_input(tex1D(tex, tex_coords, dx, dy)); }
|
|
|
|
inline float4 tex1D_linearize(const sampler1D tex, const float tex_coords, const float dx, const float dy, const int texel_off)
|
|
{ return decode_input(tex1D(tex, tex_coords, dx, dy, texel_off)); }
|
|
|
|
inline float4 tex1D_linearize(const sampler1D tex, const float2 tex_coords, const float dx, const float dy, const int texel_off)
|
|
{ return decode_input(tex1D(tex, tex_coords, dx, dy, texel_off)); }
|
|
|
|
// tex1Dbias:
|
|
inline float4 tex1Dbias_linearize(const sampler1D tex, const float4 tex_coords)
|
|
{ return decode_input(tex1Dbias(tex, tex_coords)); }
|
|
|
|
inline float4 tex1Dbias_linearize(const sampler1D tex, const float4 tex_coords, const int texel_off)
|
|
{ return decode_input(tex1Dbias(tex, tex_coords, texel_off)); }
|
|
|
|
// tex1Dfetch:
|
|
inline float4 tex1Dfetch_linearize(const sampler1D tex, const int4 tex_coords)
|
|
{ return decode_input(tex1Dfetch(tex, tex_coords)); }
|
|
|
|
inline float4 tex1Dfetch_linearize(const sampler1D tex, const int4 tex_coords, const int texel_off)
|
|
{ return decode_input(tex1Dfetch(tex, tex_coords, texel_off)); }
|
|
|
|
// tex1Dlod:
|
|
inline float4 tex1Dlod_linearize(const sampler1D tex, const float4 tex_coords)
|
|
{ return decode_input(tex1Dlod(tex, tex_coords)); }
|
|
|
|
inline float4 tex1Dlod_linearize(const sampler1D tex, const float4 tex_coords, const int texel_off)
|
|
{ return decode_input(tex1Dlod(tex, tex_coords, texel_off)); }
|
|
|
|
// tex1Dproj:
|
|
inline float4 tex1Dproj_linearize(const sampler1D tex, const float2 tex_coords)
|
|
{ return decode_input(tex1Dproj(tex, tex_coords)); }
|
|
|
|
inline float4 tex1Dproj_linearize(const sampler1D tex, const float3 tex_coords)
|
|
{ return decode_input(tex1Dproj(tex, tex_coords)); }
|
|
|
|
inline float4 tex1Dproj_linearize(const sampler1D tex, const float2 tex_coords, const int texel_off)
|
|
{ return decode_input(tex1Dproj(tex, tex_coords, texel_off)); }
|
|
|
|
inline float4 tex1Dproj_linearize(const sampler1D tex, const float3 tex_coords, const int texel_off)
|
|
{ return decode_input(tex1Dproj(tex, tex_coords, texel_off)); }
|
|
*/
|
|
// tex2D:
|
|
inline float4 tex2D_linearize(const sampler2D tex, float2 tex_coords)
|
|
{ return decode_input(COMPAT_TEXTURE(tex, tex_coords)); }
|
|
|
|
inline float4 tex2D_linearize(const sampler2D tex, float3 tex_coords)
|
|
{ return decode_input(COMPAT_TEXTURE(tex, tex_coords.xy)); }
|
|
|
|
inline float4 tex2D_linearize(const sampler2D tex, float2 tex_coords, int texel_off)
|
|
{ return decode_input(textureLod(tex, tex_coords, texel_off)); }
|
|
|
|
inline float4 tex2D_linearize(const sampler2D tex, float3 tex_coords, int texel_off)
|
|
{ return decode_input(textureLod(tex, tex_coords.xy, texel_off)); }
|
|
|
|
//inline float4 tex2D_linearize(const sampler2D tex, const float2 tex_coords, const float2 dx, const float2 dy)
|
|
//{ return decode_input(COMPAT_TEXTURE(tex, tex_coords, dx, dy)); }
|
|
|
|
//inline float4 tex2D_linearize(const sampler2D tex, const float3 tex_coords, const float2 dx, const float2 dy)
|
|
//{ return decode_input(COMPAT_TEXTURE(tex, tex_coords, dx, dy)); }
|
|
|
|
//inline float4 tex2D_linearize(const sampler2D tex, const float2 tex_coords, const float2 dx, const float2 dy, const int texel_off)
|
|
//{ return decode_input(COMPAT_TEXTURE(tex, tex_coords, dx, dy, texel_off)); }
|
|
|
|
//inline float4 tex2D_linearize(const sampler2D tex, const float3 tex_coords, const float2 dx, const float2 dy, const int texel_off)
|
|
//{ return decode_input(COMPAT_TEXTURE(tex, tex_coords, dx, dy, texel_off)); }
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|
|
|
// tex2Dbias:
|
|
//inline float4 tex2Dbias_linearize(const sampler2D tex, const float4 tex_coords)
|
|
//{ return decode_input(tex2Dbias(tex, tex_coords)); }
|
|
|
|
//inline float4 tex2Dbias_linearize(const sampler2D tex, const float4 tex_coords, const int texel_off)
|
|
//{ return decode_input(tex2Dbias(tex, tex_coords, texel_off)); }
|
|
|
|
// tex2Dfetch:
|
|
//inline float4 tex2Dfetch_linearize(const sampler2D tex, const int4 tex_coords)
|
|
//{ return decode_input(tex2Dfetch(tex, tex_coords)); }
|
|
|
|
//inline float4 tex2Dfetch_linearize(const sampler2D tex, const int4 tex_coords, const int texel_off)
|
|
//{ return decode_input(tex2Dfetch(tex, tex_coords, texel_off)); }
|
|
|
|
// tex2Dlod:
|
|
inline float4 tex2Dlod_linearize(const sampler2D tex, float4 tex_coords)
|
|
{ return decode_input(textureLod(tex, tex_coords.xy, 0.0)); }
|
|
|
|
inline float4 tex2Dlod_linearize(const sampler2D tex, float4 tex_coords, int texel_off)
|
|
{ return decode_input(textureLod(tex, tex_coords.xy, texel_off)); }
|
|
/*
|
|
// tex2Dproj:
|
|
inline float4 tex2Dproj_linearize(const sampler2D tex, const float3 tex_coords)
|
|
{ return decode_input(tex2Dproj(tex, tex_coords)); }
|
|
|
|
inline float4 tex2Dproj_linearize(const sampler2D tex, const float4 tex_coords)
|
|
{ return decode_input(tex2Dproj(tex, tex_coords)); }
|
|
|
|
inline float4 tex2Dproj_linearize(const sampler2D tex, const float3 tex_coords, const int texel_off)
|
|
{ return decode_input(tex2Dproj(tex, tex_coords, texel_off)); }
|
|
|
|
inline float4 tex2Dproj_linearize(const sampler2D tex, const float4 tex_coords, const int texel_off)
|
|
{ return decode_input(tex2Dproj(tex, tex_coords, texel_off)); }
|
|
*/
|
|
/*
|
|
// tex3D:
|
|
inline float4 tex3D_linearize(const sampler3D tex, const float3 tex_coords)
|
|
{ return decode_input(tex3D(tex, tex_coords)); }
|
|
|
|
inline float4 tex3D_linearize(const sampler3D tex, const float3 tex_coords, const int texel_off)
|
|
{ return decode_input(tex3D(tex, tex_coords, texel_off)); }
|
|
|
|
inline float4 tex3D_linearize(const sampler3D tex, const float3 tex_coords, const float3 dx, const float3 dy)
|
|
{ return decode_input(tex3D(tex, tex_coords, dx, dy)); }
|
|
|
|
inline float4 tex3D_linearize(const sampler3D tex, const float3 tex_coords, const float3 dx, const float3 dy, const int texel_off)
|
|
{ return decode_input(tex3D(tex, tex_coords, dx, dy, texel_off)); }
|
|
|
|
// tex3Dbias:
|
|
inline float4 tex3Dbias_linearize(const sampler3D tex, const float4 tex_coords)
|
|
{ return decode_input(tex3Dbias(tex, tex_coords)); }
|
|
|
|
inline float4 tex3Dbias_linearize(const sampler3D tex, const float4 tex_coords, const int texel_off)
|
|
{ return decode_input(tex3Dbias(tex, tex_coords, texel_off)); }
|
|
|
|
// tex3Dfetch:
|
|
inline float4 tex3Dfetch_linearize(const sampler3D tex, const int4 tex_coords)
|
|
{ return decode_input(tex3Dfetch(tex, tex_coords)); }
|
|
|
|
inline float4 tex3Dfetch_linearize(const sampler3D tex, const int4 tex_coords, const int texel_off)
|
|
{ return decode_input(tex3Dfetch(tex, tex_coords, texel_off)); }
|
|
|
|
// tex3Dlod:
|
|
inline float4 tex3Dlod_linearize(const sampler3D tex, const float4 tex_coords)
|
|
{ return decode_input(tex3Dlod(tex, tex_coords)); }
|
|
|
|
inline float4 tex3Dlod_linearize(const sampler3D tex, const float4 tex_coords, const int texel_off)
|
|
{ return decode_input(tex3Dlod(tex, tex_coords, texel_off)); }
|
|
|
|
// tex3Dproj:
|
|
inline float4 tex3Dproj_linearize(const sampler3D tex, const float4 tex_coords)
|
|
{ return decode_input(tex3Dproj(tex, tex_coords)); }
|
|
|
|
inline float4 tex3Dproj_linearize(const sampler3D tex, const float4 tex_coords, const int texel_off)
|
|
{ return decode_input(tex3Dproj(tex, tex_coords, texel_off)); }
|
|
/////////*
|
|
|
|
// NONSTANDARD "SMART" LINEARIZING TEXTURE LOOKUP FUNCTIONS:
|
|
// This narrow selection of nonstandard tex2D* functions can be useful:
|
|
|
|
// tex2Dlod0: Automatically fill in the tex2D LOD parameter for mip level 0.
|
|
//inline float4 tex2Dlod0_linearize(const sampler2D tex, const float2 tex_coords)
|
|
//{ return decode_input(tex2Dlod(tex, float4(tex_coords, 0.0, 0.0))); }
|
|
|
|
//inline float4 tex2Dlod0_linearize(const sampler2D tex, const float2 tex_coords, const int texel_off)
|
|
//{ return decode_input(tex2Dlod(tex, float4(tex_coords, 0.0, 0.0), texel_off)); }
|
|
|
|
|
|
// MANUALLY LINEARIZING TEXTURE LOOKUP FUNCTIONS:
|
|
// Provide a narrower selection of tex2D* wrapper functions that decode an
|
|
// input sample with a specified gamma value. These are useful for reading
|
|
// LUT's and for reading the input of pass0 in a later pass.
|
|
|
|
// tex2D:
|
|
inline float4 tex2D_linearize_gamma(const sampler2D tex, const float2 tex_coords, const float3 gamma)
|
|
{ return decode_gamma_input(COMPAT_TEXTURE(tex, tex_coords), gamma); }
|
|
|
|
inline float4 tex2D_linearize_gamma(const sampler2D tex, const float3 tex_coords, const float3 gamma)
|
|
{ return decode_gamma_input(COMPAT_TEXTURE(tex, tex_coords.xy), gamma); }
|
|
|
|
//inline float4 tex2D_linearize_gamma(const sampler2D tex, const float2 tex_coords, const int texel_off, const float3 gamma)
|
|
//{ return decode_gamma_input(COMPAT_TEXTURE(tex, tex_coords, texel_off), gamma); }
|
|
|
|
//inline float4 tex2D_linearize_gamma(const sampler2D tex, const float3 tex_coords, const int texel_off, const float3 gamma)
|
|
//{ return decode_gamma_input(COMPAT_TEXTURE(tex, tex_coords, texel_off), gamma); }
|
|
|
|
//inline float4 tex2D_linearize_gamma(const sampler2D tex, const float2 tex_coords, const float2 dx, const float2 dy, const float3 gamma)
|
|
//{ return decode_gamma_input(COMPAT_TEXTURE(tex, tex_coords, dx, dy), gamma); }
|
|
|
|
//inline float4 tex2D_linearize_gamma(const sampler2D tex, const float3 tex_coords, const float2 dx, const float2 dy, const float3 gamma)
|
|
//{ return decode_gamma_input(COMPAT_TEXTURE(tex, tex_coords, dx, dy), gamma); }
|
|
|
|
//inline float4 tex2D_linearize_gamma(const sampler2D tex, const float2 tex_coords, const float2 dx, const float2 dy, const int texel_off, const float3 gamma)
|
|
//{ return decode_gamma_input(COMPAT_TEXTURE(tex, tex_coords, dx, dy, texel_off), gamma); }
|
|
|
|
//inline float4 tex2D_linearize_gamma(const sampler2D tex, const float3 tex_coords, const float2 dx, const float2 dy, const int texel_off, const float3 gamma)
|
|
//{ return decode_gamma_input(COMPAT_TEXTURE(tex, tex_coords, dx, dy, texel_off), gamma); }
|
|
/*
|
|
// tex2Dbias:
|
|
inline float4 tex2Dbias_linearize_gamma(const sampler2D tex, const float4 tex_coords, const float3 gamma)
|
|
{ return decode_gamma_input(tex2Dbias(tex, tex_coords), gamma); }
|
|
|
|
inline float4 tex2Dbias_linearize_gamma(const sampler2D tex, const float4 tex_coords, const int texel_off, const float3 gamma)
|
|
{ return decode_gamma_input(tex2Dbias(tex, tex_coords, texel_off), gamma); }
|
|
|
|
// tex2Dfetch:
|
|
inline float4 tex2Dfetch_linearize_gamma(const sampler2D tex, const int4 tex_coords, const float3 gamma)
|
|
{ return decode_gamma_input(tex2Dfetch(tex, tex_coords), gamma); }
|
|
|
|
inline float4 tex2Dfetch_linearize_gamma(const sampler2D tex, const int4 tex_coords, const int texel_off, const float3 gamma)
|
|
{ return decode_gamma_input(tex2Dfetch(tex, tex_coords, texel_off), gamma); }
|
|
*/
|
|
// tex2Dlod:
|
|
inline float4 tex2Dlod_linearize_gamma(const sampler2D tex, float4 tex_coords, float3 gamma)
|
|
{ return decode_gamma_input(textureLod(tex, tex_coords.xy, 0.0), gamma); }
|
|
|
|
inline float4 tex2Dlod_linearize_gamma(const sampler2D tex, float4 tex_coords, int texel_off, float3 gamma)
|
|
{ return decode_gamma_input(textureLod(tex, tex_coords.xy, texel_off), gamma); }
|
|
|
|
|
|
#endif // GAMMA_MANAGEMENT_H
|
|
|
|
//////////////////////////// END GAMMA-MANAGEMENT //////////////////////////
|
|
|
|
#undef COMPAT_PRECISION
|
|
#undef COMPAT_TEXTURE
|
|
|
|
void main() {
|
|
gl_Position = position;
|
|
vTexCoord = texCoord * 1.0001;
|
|
|
|
// Detect interlacing: il_step_multiple indicates the step multiple between
|
|
// lines: 1 is for progressive sources, and 2 is for interlaced sources.
|
|
float2 video_size_ = video_size.xy;
|
|
const float y_step = 1.0 + float(is_interlaced(video_size_.y));
|
|
il_step_multiple = float2(1.0, y_step);
|
|
// Get the uv tex coords step between one texel (x) and scanline (y):
|
|
uv_step = il_step_multiple / texture_size;
|
|
|
|
// If shader parameters are used, {min, max}_{sigma, shape} are runtime
|
|
// values. Compute {sigma, shape}_range outside of scanline_contrib() so
|
|
// they aren't computed once per scanline (6 times per fragment and up to
|
|
// 18 times per vertex):
|
|
// TODO/FIXME: if these aren't used, why are they calculated? commenting for now
|
|
// const floatsigma_range = max(beam_max_sigma, beam_min_sigma) -
|
|
// beam_min_sigma;
|
|
// const float shape_range = max(beam_max_shape, beam_min_shape) -
|
|
// beam_min_shape;
|
|
|
|
// We need the pixel height in scanlines for antialiased/integral sampling:
|
|
const float ph = (video_size_.y / output_size.y) /
|
|
il_step_multiple.y;
|
|
pixel_height_in_scanlines = ph;
|
|
} |